Question 1

The reaction rate of a chemical reaction doubles when the temperature increases from 10$^{\circ}$C to 50$^{\circ}$C.What is the activation energy?

Accepted Answer

A)  3.85 $\times$ 10-20 J 
B)  3.33 $\times$ 10-20 J 
C)  2.98 $\times$ 10-20 J 
D)  2.19 $\times$ 10-20 J 
E)  1.76 $\times$ 10-20 J 
A)  3.85 $\times$ 10-20 J 
B)  3.33 $\times$ 10-20 J 
C)  2.98 $\times$ 10-20 J 
D)  2.19 $\times$ 10-20 J 
E)  1.76 $\times$ 10-20 J

Question 2

The mean free path of a molecule is 2.25 $\times$ 10-7 m in an ideal gas at standard temperature and pressure.What is the mean free path when the pressure of the gas is doubled and the temperature is tripled?

Accepted Answer

A)  0.75 $\times$ 10-7m 
B)  1.13 $\times$ 10-7m 
C)  2.25 $\times$ 10-7m 
D)  3.38 $\times$ 10-7m 
E)  3.75 $\times$ 10-7m 
A)  0.75 $\times$ 10-7m 
B)  1.13 $\times$ 10-7m 
C)  2.25 $\times$ 10-7m 
D)  3.38 $\times$ 10-7m 
E)  3.75 $\times$ 10-7m

Question 3

What is the activation energy of a chemical reaction if the reaction rate triples when the temperature goes from 10$^{\circ}$C to 30$^{\circ}$C?

Accepted Answer

A)  5.5 $\times$ 10-20 J 
B)  6.0 $\times$ 10-20 J 
C)  6.5 $\times$ 10-20 J 
D)  7.0 $\times$ 10-20 J 
E)  7.5 $\times$ 10-20 J 
A)  5.5 $\times$ 10-20 J 
B)  6.0 $\times$ 10-20 J 
C)  6.5 $\times$ 10-20 J 
D)  7.0 $\times$ 10-20 J 
E)  7.5 $\times$ 10-20 J

Question 4

A container holds oxygen and helium gases at the same temperature.Which one of the following statements is correct?

Accepted Answer

A)  the oxygen molecules have the greater kinetic energy 
B)  the helium molecules have the greater kinetic energy 
C)  the oxygen molecules have the greater speed 
D)  the helium molecules have the greater speed 
A)  the oxygen molecules have the greater kinetic energy 
B)  the helium molecules have the greater kinetic energy 
C)  the oxygen molecules have the greater speed 
D)  the helium molecules have the greater speed

Question 5

The absolute temperature of an ideal gas is directly proportional to which of the following?

Accepted Answer

A)  speed 
B)  momentum 
C)  kinetic energy 
D)  mass 
A)  speed 
B)  momentum 
C)  kinetic energy 
D)  mass

Question 6

If the temperature of a room is 62$^{\circ}$F,then what is the temperature of the room in Kelvin?

Accepted Answer

A)  289.8 K 
B)  291.7 K 
C)  300.0 K 
D)  307.8 K 
E)  312.0 K 
A)  289.8 K 
B)  291.7 K 
C)  300.0 K 
D)  307.8 K 
E)  312.0 K

Question 7

At what temperature would the rms speed of H2 molecules equal the earth's escape speed (11,200 m/s)?

Accepted Answer

A)  106 K 
B)  102 K 
C)  108 K 
D)  104 K 
A)  106 K 
B)  102 K 
C)  108 K 
D)  104 K

Question 8

If the temperature and pressure of an ideal gas is tripled,what is the ratio of the new volume to initial volume?

Accepted Answer

A)  1 
B)  9 
C)  3 
D)  0.33 
A)  1 
B)  9 
C)  3 
D)  0.33

Question 9

The mean free path of a molecule is 2.25 $\times$ 10-7 m in an ideal gas at standard temperature and pressure.What is the mean free path when the diameter of the molecule is doubled and the temperature of the gas is doubled?

Accepted Answer

A)  0.75 $\times$ 10-7m 
B)  1.13 $\times$ 10-7m 
C)  2.25 $\times$ 10-7m 
D)  3.00 $\times$ 10-7m 
E)  3.75 $\times$ 10-7m 
A)  0.75 $\times$ 10-7m 
B)  1.13 $\times$ 10-7m 
C)  2.25 $\times$ 10-7m 
D)  3.00 $\times$ 10-7m 
E)  3.75 $\times$ 10-7m

Question 10

The rms velocity of an oxygen molecule in a gas is 390 m/s.If the absolute temperature is increased by 20%,then what is the rms velocity?

Accepted Answer

A)  427 m/s 
B)  502 m/s 
C)  567 m/s 
D)  604 m/s 
E)  635 m/s 
A)  427 m/s 
B)  502 m/s 
C)  567 m/s 
D)  604 m/s 
E)  635 m/s

Question 11

How does the density of copper at its melting point of 1356 K compare to that of copper at room temperature,293 K? Its linear expansion coefficient is 17.0 $\times$ 10-6 K-1.

Accepted Answer

A)  1.054 times as large 
B)  1.018 times as large 
C)  0.946 times as large 
D)  0.982 times as large 
E)  0.947 times as large 
A)  1.054 times as large 
B)  1.018 times as large 
C)  0.946 times as large 
D)  0.982 times as large 
E)  0.947 times as large

Question 12

What is the average kinetic energy per particle in 1.00 mole of an ideal gas at a pressure of 1.50 atmospheres and a temperature of 20$^{\circ}$C?

Accepted Answer

A)  4.75 $\times$ 10-21 J 
B)  5.05 $\times$ 10-21 J 
C)  6.07 $\times$ 10-21 J 
D)  6.03 $\times$ 10-21 J 
E)  6.67 $\times$ 10-21 J 
A)  4.75 $\times$ 10-21 J 
B)  5.05 $\times$ 10-21 J 
C)  6.07 $\times$ 10-21 J 
D)  6.03 $\times$ 10-21 J 
E)  6.67 $\times$ 10-21 J

Question 13

One mole of Carbon 12 has a mass of 12.00 grams.What is the mass of a C12 atom?

Accepted Answer

A)  1.244 $\times$ 10-26 kg 
B)  1.993 $\times$ 10-26 kg 
C)  2.032 $\times$ 10-26 kg 
D)  2.440 $\times$ 10-26 kg 
E)  3.000 $\times$ 10-26 kg 
A)  1.244 $\times$ 10-26 kg 
B)  1.993 $\times$ 10-26 kg 
C)  2.032 $\times$ 10-26 kg 
D)  2.440 $\times$ 10-26 kg 
E)  3.000 $\times$ 10-26 kg

Question 14

A brass rod is 25.0 cm long at a temperature of 20.0$^{\circ}$C.The coefficient of linear expansion of brass is 19.0 $\times$10-6/$^{\circ}$C.If the temperature changes to 25$^{\circ}$C,then the increase in length of the brass rod is

Accepted Answer

A)  1.65 $\times$ 10-5 m. 
B)  2.37 $\times$ 10-5 m. 
C)  3.03 $\times$ 10-5 m. 
D)  3.72 $\times$ 10-5 m. 
E)  4.01 $\times$ 10-5 m. 
A)  1.65 $\times$ 10-5 m. 
B)  2.37 $\times$ 10-5 m. 
C)  3.03 $\times$ 10-5 m. 
D)  3.72 $\times$ 10-5 m. 
E)  4.01 $\times$ 10-5 m.

Question 15

One mole of an ideal gas with a volume of 4.00 liters and a temperature of 0$^{\circ}$C is mixed with one mole of an ideal gas with a volume of 2.00 liters and a temperature of 100$^{\circ}$C.The volume of the mixture is 6 liters.What is the N/V of the mixture?

Accepted Answer

A)  1.75 $\times$ 1026 m-3 
B)  2.01 $\times$ 1026 m-3 
C)  2.66 $\times$ 1026 m-3 
D)  3.21 $\times$ 1026 m-3 
E)  3.56 $\times$ 1026 m-3 
A)  1.75 $\times$ 1026 m-3 
B)  2.01 $\times$ 1026 m-3 
C)  2.66 $\times$ 1026 m-3 
D)  3.21 $\times$ 1026 m-3 
E)  3.56 $\times$ 1026 m-3

Question 16

The mean free path of a molecule is 2.25 $\times$ 10-7 m in an ideal gas at standard temperature and pressure.What is the mean free path when the pressure of the gas is doubled and the temperature is constant?

Accepted Answer

A)  0.75 $\times$ 10-7m 
B)  1.13 $\times$ 10-7m 
C)  2.25 $\times$ 10-7m 
D)  3.38 $\times$ 10-7m 
E)  3.75 $\times$ 10-7m 
A)  0.75 $\times$ 10-7m 
B)  1.13 $\times$ 10-7m 
C)  2.25 $\times$ 10-7m 
D)  3.38 $\times$ 10-7m 
E)  3.75 $\times$ 10-7m

Question 17

A sample of water has a mass of 10.0 grams.What is the number of molecules of water in the 10.0 gram sample (H = 1u,O = 16u)?

Accepted Answer

A)  1.99 $\times$ 1023 
B)  2.00 $\times$ 1023 
C)  2.56 $\times$ 1023 
D)  3.34 $\times$ 1023 
E)  4.25 $\times$ 1023 
A)  1.99 $\times$ 1023 
B)  2.00 $\times$ 1023 
C)  2.56 $\times$ 1023 
D)  3.34 $\times$ 1023 
E)  4.25 $\times$ 1023

Question 18

What are the dimensions of the diffusion constant?

Accepted Answer

A)  m/s3 
B)  m3/s2 
C)  m3/s 
D)  m2/s 
E)  m/s2 
A)  m/s3 
B)  m3/s2 
C)  m3/s 
D)  m2/s 
E)  m/s2

Question 19

An ideal gas at a temperature of 39$^{\circ}$C has a pressure of 2.00 atmospheres and a volume of 2.10 liters.What is the temperature if the pressure is halved and the volume is tripled?

Accepted Answer

A)  155$^{\circ}$C 
B)  175$^{\circ}$C 
C)  188$^{\circ}$C 
D)  195$^{\circ}$C 
E)  204$^{\circ}$C 
A)  155$^{\circ}$C 
B)  175$^{\circ}$C 
C)  188$^{\circ}$C 
D)  195$^{\circ}$C 
E)  204$^{\circ}$C

Question 20

2.00 moles of an ideal gas is at a pressure of 1.50 atmospheres and fills a volume of 2.00 liters.What is the average kinetic energy per particle in the gas?

Accepted Answer

A)  3.96 $\times$ 10-22 J 
B)  3.03 $\times$ 10-22 J 
C)  2.83 $\times$ 10-22 J 
D)  2.52 $\times$ 10-22 J 
E)  1.98 $\times$ 10-22 J 
A)  3.96 $\times$ 10-22 J 
B)  3.03 $\times$ 10-22 J 
C)  2.83 $\times$ 10-22 J 
D)  2.52 $\times$ 10-22 J 
E)  1.98 $\times$ 10-22 J

Exam 13: Temperature and the Ideal Gas

The reaction rate of a chemical reaction doubles when the temperature increases from 10 ∘^{\circ}∘ C to 50 ∘^{\circ}∘ C.What is the activation energy?

The mean free path of a molecule is 2.25 ×\times× 10-7 m in an ideal gas at standard temperature and pressure.What is the mean free path when the pressure of the gas is doubled and the temperature is tripled?

What is the activation energy of a chemical reaction if the reaction rate triples when the temperature goes from 10 ∘^{\circ}∘ C to 30 ∘^{\circ}∘ C?

A container holds oxygen and helium gases at the same temperature.Which one of the following statements is correct?

The absolute temperature of an ideal gas is directly proportional to which of the following?

If the temperature of a room is 62 ∘^{\circ}∘ F,then what is the temperature of the room in Kelvin?

At what temperature would the rms speed of H2 molecules equal the earth's escape speed (11,200 m/s)?

If the temperature and pressure of an ideal gas is tripled,what is the ratio of the new volume to initial volume?

The mean free path of a molecule is 2.25 ×\times× 10-7 m in an ideal gas at standard temperature and pressure.What is the mean free path when the diameter of the molecule is doubled and the temperature of the gas is doubled?

The rms velocity of an oxygen molecule in a gas is 390 m/s.If the absolute temperature is increased by 20%,then what is the rms velocity?

How does the density of copper at its melting point of 1356 K compare to that of copper at room temperature,293 K? Its linear expansion coefficient is 17.0 ×\times× 10-6 K-1.

What is the average kinetic energy per particle in 1.00 mole of an ideal gas at a pressure of 1.50 atmospheres and a temperature of 20 ∘^{\circ}∘ C?

One mole of Carbon 12 has a mass of 12.00 grams.What is the mass of a C12 atom?

A brass rod is 25.0 cm long at a temperature of 20.0 ∘^{\circ}∘ C.The coefficient of linear expansion of brass is 19.0 ×\times× 10-6/ ∘^{\circ}∘ C.If the temperature changes to 25 ∘^{\circ}∘ C,then the increase in length of the brass rod is

One mole of an ideal gas with a volume of 4.00 liters and a temperature of 0 ∘^{\circ}∘ C is mixed with one mole of an ideal gas with a volume of 2.00 liters and a temperature of 100 ∘^{\circ}∘ C.The volume of the mixture is 6 liters.What is the N/V of the mixture?

The mean free path of a molecule is 2.25 ×\times× 10-7 m in an ideal gas at standard temperature and pressure.What is the mean free path when the pressure of the gas is doubled and the temperature is constant?

A sample of water has a mass of 10.0 grams.What is the number of molecules of water in the 10.0 gram sample (H = 1u,O = 16u)?

What are the dimensions of the diffusion constant?

An ideal gas at a temperature of 39 ∘^{\circ}∘ C has a pressure of 2.00 atmospheres and a volume of 2.10 liters.What is the temperature if the pressure is halved and the volume is tripled?

2.00 moles of an ideal gas is at a pressure of 1.50 atmospheres and fills a volume of 2.00 liters.What is the average kinetic energy per particle in the gas?

Introduction

Force

Acceleration and Newtons Second Law of Motion

Motion With Constant Acceleration

Circular Motion

Conservation of Energy

Linear Momentum

Torque and Angular Momentum

Fluids

Elasticity and Oscillations

Waves

Sound

Heat

Thermodynamics

Electric Forces and Fields

Electric Potential

Electric Current and Circuits

Magnetic Forces and Fields

Electromagnetic Induction

Alternating Current

Electromagnetic Waves

Reflection and Refraction of Light

Optical Instruments

Interference and Diffraction

Relativity

Early Quantum Physics and the Photon

Quantum Physics

Nuclear Physics

Particle Physics

Filters

The reaction rate of a chemical reaction doubles when the temperature increases from 10 $^{\circ}$ C to 50 $^{\circ}$ C.What is the activation energy?

The mean free path of a molecule is 2.25 $\times$ 10^-7 m in an ideal gas at standard temperature and pressure.What is the mean free path when the pressure of the gas is doubled and the temperature is tripled?

What is the activation energy of a chemical reaction if the reaction rate triples when the temperature goes from 10 $^{\circ}$ C to 30 $^{\circ}$ C?

If the temperature of a room is 62 $^{\circ}$ F,then what is the temperature of the room in Kelvin?

At what temperature would the rms speed of H₂ molecules equal the earth's escape speed (11,200 m/s)?

The mean free path of a molecule is 2.25 $\times$ 10^-7 m in an ideal gas at standard temperature and pressure.What is the mean free path when the diameter of the molecule is doubled and the temperature of the gas is doubled?

How does the density of copper at its melting point of 1356 K compare to that of copper at room temperature,293 K? Its linear expansion coefficient is 17.0 $\times$ 10^-6 K^-1.

What is the average kinetic energy per particle in 1.00 mole of an ideal gas at a pressure of 1.50 atmospheres and a temperature of 20 $^{\circ}$ C?

One mole of Carbon 12 has a mass of 12.00 grams.What is the mass of a C₁₂ atom?

A brass rod is 25.0 cm long at a temperature of 20.0 $^{\circ}$ C.The coefficient of linear expansion of brass is 19.0 $\times$ 10^-6/ $^{\circ}$ C.If the temperature changes to 25 $^{\circ}$ C,then the increase in length of the brass rod is

One mole of an ideal gas with a volume of 4.00 liters and a temperature of 0 $^{\circ}$ C is mixed with one mole of an ideal gas with a volume of 2.00 liters and a temperature of 100 $^{\circ}$ C.The volume of the mixture is 6 liters.What is the N/V of the mixture?

The mean free path of a molecule is 2.25 $\times$ 10^-7 m in an ideal gas at standard temperature and pressure.What is the mean free path when the pressure of the gas is doubled and the temperature is constant?

An ideal gas at a temperature of 39 $^{\circ}$ C has a pressure of 2.00 atmospheres and a volume of 2.10 liters.What is the temperature if the pressure is halved and the volume is tripled?