Question 1

The molar entropy of silver at 298 K is equal to the area under the curve obtained by plotting (from T = 0 to T = 298 K)

Accepted Answer

A)  CP versus T. 
B)  lnCP versus T. 
C)  ln(CP/T) versus T. 
D)  CP/T versus T. 
E)  CP versus 1/T. 
A)  CP versus T. 
B)  lnCP versus T. 
C)  ln(CP/T) versus T. 
D)  CP/T versus T. 
E)  CP versus 1/T.

Question 2

The energy levels of two particle in a box systems are   Which system has the higher entropy?

Accepted Answer

The answer of The energy levels of two particle in...

Question 3

Calculate the normal boiling point of chloroform, given that the standard entropy and enthalpy of vaporization of chloroform is +93.7 J.K-1.mol-1  and 31.4 J.K-1.mol-1 .

Accepted Answer

The answer of Calculate the normal boiling point of chloroform,...

Question 4

Given the standard reaction enthalpies below:
N2(g)+ O2$\rightarrow$ 2NO(g)
$\Delta$H° = +180.5 kJ.mol-1 
2NO2(g)$\rightarrow$N2(g)+ 2O2(g)
$\Delta$H° = -66.4 kJ.mol-1 
Calculate the standard reaction enthalpy for the oxidation of nitric oxide to nitrogen dioxide,
Shown below:
2NO(g)+ O2(g)$\rightarrow$2NO2(g)

Accepted Answer

A)  .-114.1 kJ.mol-1  
B)  -246.9 kJ.mol-1 . 
C) -114.1 kJ.mol-1  
D) . -294.6 kJ.mol-1  . 
E)  - 246.9 kJ.mol-1 . 
A)  .-114.1 kJ.mol-1  
B)  -246.9 kJ.mol-1 . 
C) -114.1 kJ.mol-1  
D) . -294.6 kJ.mol-1  . 
E)  - 246.9 kJ.mol-1 .

Question 5

When a gas expands into a vacuum,w = 0.

Accepted Answer

A) True 
 B)False

Question 6

The hydrolysis of ATP to ADP is spontaneous. However,the reaction of glucose with monohydrogen phosphate,the first step in the oxidation of glucose,is not spontaneous.Determine whether the coupled reactions are spontaneous.

Accepted Answer

A) True 
 B)False

Question 7

The combustion of 1 mole of ethanol, C2H5OH(l),In a bomb calorimeter released 1240 kJ of heat.The products of the reaction are carbon dioxide and liquid water.What is the enthalpy change for this reaction?

Accepted Answer

A)  -1245 kJ.mol-1  
B) -1235 kJ.mol-1  
C)  +1235 kJ.mol-1  
D)  +1240 kJ.mol-1  
E)  -1240 kJ.mol-1  
A)  -1245 kJ.mol-1  
B) -1235 kJ.mol-1  
C)  +1235 kJ.mol-1  
D)  +1240 kJ.mol-1  
E)  -1240 kJ.mol-1

Question 8

Consider the following compounds and their standard free energies of formation: $\begin{array}{|c|c|c|c|c|}
\hline 1&2&3&4&5\
\hline \begin{array}{c}
\mathrm{C}_{6} \mathrm{H}_{12}(\mathrm{l}) \
\text { cyclohexane }
\end{array} & \begin{array}{c}
\mathrm{CH}_{3} \mathrm{OH}(\mathrm{l}) \
\text { methanol }
\end{array} & \begin{array}{c}
\mathrm{N}_{2} \mathrm{H}_{4}(\mathrm{l}) \
\text { hydrazine }
\end{array} & \begin{array}{c}
\mathrm{H}_{2} \mathrm{O}_{2}(\mathrm{l}) \
\text { hydrogen peroxide }
\end{array} & \begin{array}{c}
\mathrm{CS}_{2}(\mathrm{l}) \
\text { carbon disulfide }
\end{array} \
\hline+6.4 \mathrm{~kJ} \cdot \mathrm{mol}^{-1} & -166 \mathrm{~kJ} \cdot \mathrm{mol}^{-1} & +149 \mathrm{~kJ} \cdot \mathrm{mol}^{-1} & -120 \mathrm{~kJ} \cdot \mathrm{mol}^{-1} & +65.3 \mathrm{~kJ} \cdot \mathrm{mol}^{-1} \
\hline
\end{array}$ Which of these liquids is (are)Thermodynamically unstable?

Accepted Answer

A)  2 
B)  1, 3, and 5 
C)  1 and 4 
D)  2 and 3 
E)  2 and 4 
A)  2 
B)  1, 3, and 5 
C)  1 and 4 
D)  2 and 3 
E)  2 and 4

Question 9

The molar heat capacity of a monatomic ideal gas is independent of temperature and pressure.

Accepted Answer

A) True 
 B)False

Question 10

What is the total motional contribution to the molar internal energy of gaseous BF3?

Accepted Answer

A)  RT 
B)  3.5RT 
C)  3RT 
D)  1.5RT 
E)  2.5RT 
A)  RT 
B)  3.5RT 
C)  3RT 
D)  1.5RT 
E)  2.5RT

Question 11

The reactionCaO(s)+ H2O(l)$\rightarrow$Ca(OH)2(s)Is spontaneous at 0oC.Pedict the sign of the reaction enthalpy and entropy,Respectively.

Accepted Answer

A)  +and- 
B) - and - 
C)  + and + 
D)  - and + 
E)  - and 0 
A)  +and- 
B) - and - 
C)  + and + 
D)  - and + 
E)  - and 0

Question 12

Which of the following has the smallest molar entropy at 298 K?

Accepted Answer

A)  Cl2(g) 
B)  N2(g) 
C)  He(g) 
D)  F2(g) 
E)  Ne(g) 
A)  Cl2(g) 
B)  N2(g) 
C)  He(g) 
D)  F2(g) 
E)  Ne(g)

Question 13

For the reaction
2C(s)+ 2H2(g)$\rightarrow$ C2H4(g)
$\Delta$Hr$\omicron$ = +52.3 kJ.mol-1 >and $\Delta$Sr$\omicron$ = -53.07 J.K.mol-1  at 298 K.
This reaction will be spontaneous at

Accepted Answer

A)  no temperature. 
B)  all temperatures. 
C)  temperatures below 985 K. 
D)  temperatures above 985 K. 
E)  temperatures below 1015 K. 
A)  no temperature. 
B)  all temperatures. 
C)  temperatures below 985 K. 
D)  temperatures above 985 K. 
E)  temperatures below 1015 K.

Question 14

Calculate the standard free energy of formation of mercury(II) oxide at 298 K,
Given
$\begin{array}{ll}&\mathrm{HgO}(\mathrm{s}) & \mathrm{Hg}(1) &\mathrm{O}_{2}(\mathrm{~g})\
\Delta H_{\mathrm{f}^{\circ}}, \mathrm{kJ} \cdot \mathrm{mol}^{-1} & -90.83&-&- \
S_{\mathrm{m}}{ }^{\circ}, \mathrm{J} \cdot \mathrm{K}^{-1} \cdot \mathrm{mol}^{-1} & 70.29&76.02&205.14
\end{array}$

Accepted Answer

A)  +58.5 kJ.mol-1  
B)  +117.1 kJ.mol-1  
C)  -58.5 kJ.mol-1  
D)  -123.1 kJ.mol-1  
E)  -117.1 kJ.mol-1  
A)  +58.5 kJ.mol-1  
B)  +117.1 kJ.mol-1  
C)  -58.5 kJ.mol-1  
D)  -123.1 kJ.mol-1  
E)  -117.1 kJ.mol-1

Question 15

Calculate the standard reaction enthalpy for the following reaction.
$\begin{array}{ll}\mathrm{CH}_{4}(\mathrm{~g})+\mathrm{H}_{2} \mathrm{O}(\mathrm{g}) \rightarrow \mathrm{CO}(\mathrm{g})+3 \mathrm{H}_{2}(\mathrm{~g})\
\text { Given: }2 \mathrm{H}_{2}(\mathrm{~g})+\mathrm{CO}(\mathrm{g}) \rightarrow \mathrm{CH}_{3} \mathrm{OH}(\mathrm{l}) & \Delta H^{\circ}=-128.3 \mathrm{~kJ} \cdot \mathrm{mol}^{-1} \
2 \mathrm{CH}_{4}(\mathrm{~g})+\mathrm{O}_{2}(\mathrm{~g}) \rightarrow 2 \mathrm{CH}_{3} \mathrm{OH}(\mathrm{l}) & \Delta H^{\circ}=-328.1 \mathrm{~kJ} \cdot \mathrm{mol}^{-1} \
2 \mathrm{H}_{2}(\mathrm{~g})+\mathrm{O}_{2}(\mathrm{~g}) \rightarrow 2 \mathrm{H}_{2} \mathrm{O}(\mathrm{g}) & \Delta H^{\circ}=-483.6 \mathrm{~kJ} \cdot \mathrm{mol}^{-1}
\end{array}$

Accepted Answer

A)  +155.5 kJ.mol-1  
B)  + 216 kJ.mol-1  
C)  +412.1 kJ.mol-1  
D)  +42.0 kJ.mol-1  
E)  +206.1 kJ.mol-1  
A)  +155.5 kJ.mol-1  
B)  + 216 kJ.mol-1  
C)  +412.1 kJ.mol-1  
D)  +42.0 kJ.mol-1  
E)  +206.1 kJ.mol-1

Question 16

Calculate the standard enthalpy of formation of potassium chloride given the following enthalpy data.
 $$\begin{array} { l l } 
\mathrm { K } ( \mathrm { s } ) \rightarrow \mathrm { K } ( \mathrm { g } ) & + 89 \mathrm {~kJ} \cdot \mathrm { mol } ^ { - 1 } \
\mathrm {~K} ( \mathrm {~g} ) \rightarrow \mathrm { K } ^ { + } ( \mathrm { g } ) + \mathrm { e } ^ { - } & + 418 \mathrm {~kJ} \cdot \mathrm { mol } ^ { - 1 } \
1 / 2 \mathrm { Cl } _ { 2 } ( \mathrm {~g} ) \rightarrow \mathrm { Cl } ( \mathrm { g } ) & + 122 \mathrm {~kJ} \cdot \mathrm { mol } ^ { - 1 } \
\mathrm { Cl } ( \mathrm { g } ) \mathrm { e } ^ { - } \rightarrow \mathrm { Cl } ^ { - } ( \mathrm { g } ) & - 349 \mathrm {~kJ} \cdot \mathrm { mol } ^ { - 1 } \
\mathrm { KCl } ( \mathrm { s } ) \rightarrow \mathrm { K } ^ { + } ( \mathrm { g } ) + \mathrm { Cl } ^ { - } ( \mathrm { g } ) & + 717 \mathrm {~kJ} \cdot \mathrm { mol } ^ { - 1 }
\end{array}$$

Accepted Answer

-437 kJ.mo

Question 17

Which of the following has the largest molar entropy?

Accepted Answer

A)  H2(g) 
B)  KF(aq) 
C)  CO2(s) 
D)  CaO(s) 
E)  He(l) 
A)  H2(g) 
B)  KF(aq) 
C)  CO2(s) 
D)  CaO(s) 
E)  He(l)

Question 18

All bond enthalpies are positive.

Accepted Answer

A) True 
 B)False

Question 19

The combustion of one mole of octane, C8H18(l), In a bomb calorimeter released 5460 kJ of heat at 298 K.The products of the reaction are carbon dioxide and liquid water.What is the enthalpy change for this reaction?

Accepted Answer

A)  +5471 kJ.mol-1  
B)  -5460 kJ.mol-1  
C)  -5471 kJ.mol-1  
D)  -5449 kJ.mol-1  
E)  +5460 kJ.mol-1  
A)  +5471 kJ.mol-1  
B)  -5460 kJ.mol-1  
C)  -5471 kJ.mol-1  
D)  -5449 kJ.mol-1  
E)  +5460 kJ.mol-1

Question 20

What is the total motional contribution to the molar internal energy of gaseous HCN?

Accepted Answer

A)  3RT 
B)  3.5RT 
C)  2.5RT 
D)  RT 
E)  1.5RT 
A)  3RT 
B)  3.5RT 
C)  2.5RT 
D)  RT 
E)  1.5RT

The molar entropy of silver at 298 K is equal to the area under the curve obtained by plotting (from T = 0 to T = 298 K)

The energy levels of two particle in a box systems are Which system has the higher entropy?

Calculate the normal boiling point of chloroform, given that the standard entropy and enthalpy of vaporization of chloroform is +93.7 J.K^-¹.mol^-¹ and 31.4 J.K^-¹.mol^-¹.

When a gas expands into a vacuum,w = 0.

The hydrolysis of ATP to ADP is spontaneous. However,the reaction of glucose with monohydrogen phosphate,the first step in the oxidation of glucose,is not spontaneous.Determine whether the coupled reactions are spontaneous.

The combustion of 1 mole of ethanol, C₂H₅OH(l),In a bomb calorimeter released 1240 kJ of heat.The products of the reaction are carbon dioxide and liquid water.What is the enthalpy change for this reaction?

Consider the following compounds and their standard free energies of formation: 1 2 3 4 5 () cyclohexane () methanol () hydrazine () hydrogen peroxide () carbon disulfide +6.4\cdot -166\cdot +149\cdot -120\cdot +65.3\cdot Which of these liquids is (are)Thermodynamically unstable?

The molar heat capacity of a monatomic ideal gas is independent of temperature and pressure.

What is the total motional contribution to the molar internal energy of gaseous BF₃?

The reactionCaO(s)+ H₂O(l) $\rightarrow$ Ca(OH)₂(s)Is spontaneous at 0^oC.Pedict the sign of the reaction enthalpy and entropy,Respectively.

Which of the following has the smallest molar entropy at 298 K?

For the reaction 2C(s)+ 2H₂(g) $\rightarrow$ C₂H₄(g) $\Delta$ H_r^$\omicron$ = +52.3 kJ.mol^-¹>and $\Delta$ S_r^$\omicron$= -53.07 J.K.mol^-¹ at 298 K. This reaction will be spontaneous at

Calculate the standard free energy of formation of mercury(II) oxide at 298 K, Given () (1) () \Delta,\cdot -90.83 - - ,\cdot\cdot 70.29 76.02 205.14

Calculate the standard reaction enthalpy for the following reaction. ()+()\rightarrow()+3() Given: 2()+()\rightarrow() \Delta=-128.3\cdot 2()+()\rightarrow2() \Delta=-328.1\cdot 2()+()\rightarrow2() \Delta=-483.6\cdot

Calculate the standard enthalpy of formation of potassium chloride given the following enthalpy data. ()\rightarrow() +89\cdot ()\rightarrow()+ +418\cdot 1/2()\rightarrow() +122\cdot ()\rightarrow() -349\cdot ()\rightarrow()+() +717\cdot

Which of the following has the largest molar entropy?

All bond enthalpies are positive.

The combustion of one mole of octane, C₈H₁₈(l), In a bomb calorimeter released 5460 kJ of heat at 298 K.The products of the reaction are carbon dioxide and liquid water.What is the enthalpy change for this reaction?

What is the total motional contribution to the molar internal energy of gaseous HCN?

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Exam 4: Thermodynamics

The molar entropy of silver at 298 K is equal to the area under the curve obtained by plotting (from T = 0 to T = 298 K)

The energy levels of two particle in a box systems are Which system has the higher entropy?

Calculate the normal boiling point of chloroform, given that the standard entropy and enthalpy of vaporization of chloroform is +93.7 J.K-1.mol-1 and 31.4 J.K-1.mol-1 .

When a gas expands into a vacuum,w = 0.

The hydrolysis of ATP to ADP is spontaneous. However,the reaction of glucose with monohydrogen phosphate,the first step in the oxidation of glucose,is not spontaneous.Determine whether the coupled reactions are spontaneous.

The combustion of 1 mole of ethanol, C2H5OH(l),In a bomb calorimeter released 1240 kJ of heat.The products of the reaction are carbon dioxide and liquid water.What is the enthalpy change for this reaction?

Consider the following compounds and their standard free energies of formation: 1 2 3 4 5 () cyclohexane () methanol () hydrazine () hydrogen peroxide () carbon disulfide +6.4\cdot -166\cdot +149\cdot -120\cdot +65.3\cdot Which of these liquids is (are)Thermodynamically unstable?

The molar heat capacity of a monatomic ideal gas is independent of temperature and pressure.

What is the total motional contribution to the molar internal energy of gaseous BF3?

The reactionCaO(s)+ H2O(l) →\rightarrow→ Ca(OH)2(s)Is spontaneous at 0oC.Pedict the sign of the reaction enthalpy and entropy,Respectively.

Which of the following has the smallest molar entropy at 298 K?

For the reaction 2C(s)+ 2H2(g) →\rightarrow→ C2H4(g) Δ\DeltaΔ Hr ο\omicronο = +52.3 kJ.mol-1 >and Δ\DeltaΔ Sr ο\omicronο = -53.07 J.K.mol-1 at 298 K. This reaction will be spontaneous at

Calculate the standard free energy of formation of mercury(II) oxide at 298 K, Given () (1) () \Delta,\cdot -90.83 - - ,\cdot\cdot 70.29 76.02 205.14

Calculate the standard reaction enthalpy for the following reaction. ()+()\rightarrow()+3() Given: 2()+()\rightarrow() \Delta=-128.3\cdot 2()+()\rightarrow2() \Delta=-328.1\cdot 2()+()\rightarrow2() \Delta=-483.6\cdot

Calculate the standard enthalpy of formation of potassium chloride given the following enthalpy data. ()\rightarrow() +89\cdot ()\rightarrow()+ +418\cdot 1/2()\rightarrow() +122\cdot ()\rightarrow() -349\cdot ()\rightarrow()+() +717\cdot

Which of the following has the largest molar entropy?

All bond enthalpies are positive.

The combustion of one mole of octane, C8H18(l), In a bomb calorimeter released 5460 kJ of heat at 298 K.The products of the reaction are carbon dioxide and liquid water.What is the enthalpy change for this reaction?

What is the total motional contribution to the molar internal energy of gaseous HCN?

Atoms

Molecules

States of Matter

Equilibrium

Reactions

Kinetics

The Main-Group Elements

The D-Block Elements

Nuclear Chemistry

Organic Chemistry

Filters

Calculate the normal boiling point of chloroform, given that the standard entropy and enthalpy of vaporization of chloroform is +93.7 J.K^-¹.mol^-¹ and 31.4 J.K^-¹.mol^-¹.

The combustion of 1 mole of ethanol, C₂H₅OH(l),In a bomb calorimeter released 1240 kJ of heat.The products of the reaction are carbon dioxide and liquid water.What is the enthalpy change for this reaction?

What is the total motional contribution to the molar internal energy of gaseous BF₃?

The reactionCaO(s)+ H₂O(l) $\rightarrow$ Ca(OH)₂(s)Is spontaneous at 0^oC.Pedict the sign of the reaction enthalpy and entropy,Respectively.

For the reaction 2C(s)+ 2H₂(g) $\rightarrow$ C₂H₄(g) $\Delta$ H_r^$\omicron$ = +52.3 kJ.mol^-¹>and $\Delta$ S_r^$\omicron$= -53.07 J.K.mol^-¹ at 298 K. This reaction will be spontaneous at

The combustion of one mole of octane, C₈H₁₈(l), In a bomb calorimeter released 5460 kJ of heat at 298 K.The products of the reaction are carbon dioxide and liquid water.What is the enthalpy change for this reaction?