Question 1

Which of the following signs on q and w represent a system that is doing work on the surroundings as well as losing heat to the surroundings?

Accepted Answer

A) q = - ,w = - 
B) q = +,w = + 
C) q = -,w = + 
D) q = +,w = - 
E) None of these represent the system referenced above. 
A) q = - ,w = - 
B) q = +,w = + 
C) q = -,w = + 
D) q = +,w = - 
E) None of these represent the system referenced above.

Question 2

Give the temperature and pressure for the standard state for a liquid.

Accepted Answer

For the standard sta

Question 3

The specific heat capacity of liquid water is 4.184 J $g ^ { - 1 }$ $\mathrm { K } ^ { - 1 }$ .How many joules of heat are needed to raise the temperature of 7.00 g of water from 33.0 °C to 76.0 °C?

Accepted Answer

A) 3.19 × 103 J 
B) 25.7 J 
C) 1.39 × 10-2 J 
D) 71.9 J 
E) 1.26 × 103 J 
A) 3.19 × 103 J 
B) 25.7 J 
C) 1.39 × 10-2 J 
D) 71.9 J 
E) 1.26 × 103 J

Question 4

Calculate the enthalpy of solution for the dissolution of sodium chloride,NaCl,molar mass = 58.443 g mol-1.When 6.93 g of NaCl is dissolved in a coffee cup calorimeter containing 100.0 mL of water the temperature dropped from 23.5 °C to 22.4 °C.The specific heat of water is 4.184 J g-1 °C-1,and assume the density of the solution is 1.00 g mL-1.

Accepted Answer

A) -2.8 kJ mol-1 
B) 3.9 kJ mol-1 
C) -6.4 kJ mol-1 
D) 4.1 kJ mol-1 
E) 6.3 kJ mol-1 
A) -2.8 kJ mol-1 
B) 3.9 kJ mol-1 
C) -6.4 kJ mol-1 
D) 4.1 kJ mol-1 
E) 6.3 kJ mol-1

Question 5

Use the standard reaction enthalpies given below to determine $D _ { \mathrm { r } }$ H° for the following reaction: 2S(s)+ 3O2(g)? 2SO3(g) DrH°= ?
Given:
SO2(g)? S(s)+ O2(g) DrH°= +296.8 kJ
2SO2(g)+ O2(g)? 2SO3(g) DrH°= -197.8 kJ

Accepted Answer

A) -494.6 kJ mol-1 
B) -692.4 kJ mol-1 
C) -791.4 kJ mol-1 
D) 1583 kJ mol-1 
E) -293.0 kJ mol-1 
A) -494.6 kJ mol-1 
B) -692.4 kJ mol-1 
C) -791.4 kJ mol-1 
D) 1583 kJ mol-1 
E) -293.0 kJ mol-1

Which of the following signs on q and w represent a system that is doing work on the surroundings as well as losing heat to the surroundings?

Give the temperature and pressure for the standard state for a liquid.

The specific heat capacity of liquid water is 4.184 J $g ^ { - 1 }$ $\mathrm { K } ^ { - 1 }$ .How many joules of heat are needed to raise the temperature of 7.00 g of water from 33.0 °C to 76.0 °C?

Use the standard reaction enthalpies given below to determine $D _ { \mathrm { r } }$ H° for the following reaction: 2S(s)+ 3O₂(g)? 2SO₃(g) _DrH°= ? Given: SO₂(g)? S(s)+ O₂(g) _DrH°= +296.8 kJ 2SO₂(g)+ O₂(g)? 2SO₃(g) _DrH°= -197.8 kJ

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Exam 6: Thermochemistry

Which of the following signs on q and w represent a system that is doing work on the surroundings as well as losing heat to the surroundings?

Give the temperature and pressure for the standard state for a liquid.

The specific heat capacity of liquid water is 4.184 J g−1g ^ { - 1 }g−1 K−1\mathrm { K } ^ { - 1 }K−1 .How many joules of heat are needed to raise the temperature of 7.00 g of water from 33.0 °C to 76.0 °C?

Use the standard reaction enthalpies given below to determine DrD _ { \mathrm { r } }Dr​ H° for the following reaction: 2S(s)+ 3O2(g)? 2SO3(g) DrH°= ? Given: SO2(g)? S(s)+ O2(g) DrH°= +296.8 kJ 2SO2(g)+ O2(g)? 2SO3(g) DrH°= -197.8 kJ

Units of Measurement for Physical and Chemical Change

Atoms and Elements

Molecules,compounds,and Nomenclature

Chemical Reactions and Stoichiometry

Gases

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding II: Molecular Shapes, valence Bond Theory, and Molecular Orbital Theory

Liquids, solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Gibbs Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry I: Structures

Organic Chemistry II: Reactions

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

The specific heat capacity of liquid water is 4.184 J $g ^ { - 1 }$ $\mathrm { K } ^ { - 1 }$ .How many joules of heat are needed to raise the temperature of 7.00 g of water from 33.0 °C to 76.0 °C?

Use the standard reaction enthalpies given below to determine $D _ { \mathrm { r } }$ H° for the following reaction: 2S(s)+ 3O₂(g)? 2SO₃(g) _DrH°= ? Given: SO₂(g)? S(s)+ O₂(g) _DrH°= +296.8 kJ 2SO₂(g)+ O₂(g)? 2SO₃(g) _DrH°= -197.8 kJ