Question 1

Suppose you put a closed,sealed can of air on a hot stove burner.The contained air will undergo an increase in

Accepted Answer

A) internal energy,temperature and pressure. 
B) temperature. 
C) pressure. 
D) internal energy. 
E) temperature and pressure. 
A) internal energy,temperature and pressure. 
B) temperature. 
C) pressure. 
D) internal energy. 
E) temperature and pressure.

Question 2

Two identical blocks of iron,one at 10 degrees C and the other at 20 degrees C,are put in contact.Suppose the cooler block cools to 5 degrees C and the warmer block warms to 25 degrees C.This would violate the

Accepted Answer

A) 1st law of thermodynamics. 
B) 2nd law of thermodynamics. 
C) both of these 
D) neither of these 
A) 1st law of thermodynamics. 
B) 2nd law of thermodynamics. 
C) both of these 
D) neither of these

Question 3

The first law of thermodynamics is a restatement of the

Accepted Answer

A) principle of entropy. 
B) law of heat addition. 
C) Carnot cycle. 
D) conservation of energy. 
E) none of these 
A) principle of entropy. 
B) law of heat addition. 
C) Carnot cycle. 
D) conservation of energy. 
E) none of these

Question 4

When mechanical work is done on a system,there can be an increase in

Accepted Answer

A) its internal energy. 
B) its temperature. 
C) both temperature and internal energy. 
D) neither temperature nor internal energy. 
A) its internal energy. 
B) its temperature. 
C) both temperature and internal energy. 
D) neither temperature nor internal energy.

Question 5

The ideal efficiency for a heat engine operating between the temperatures of 227 degrees C and 27 degrees C is

Accepted Answer

A) 20%. 
B) 25%. 
C) 40%. 
D) 88%. 
E) none of these 
A) 20%. 
B) 25%. 
C) 40%. 
D) 88%. 
E) none of these

Question 6

Consider a piece of metal that is at 10 degrees C.If it is heated until it has twice the internal energy,its temperature will be

Accepted Answer

A) 20 degrees C. 
B) 273 degrees C. 
C) 293 degrees C. 
D) 566 degrees C. 
E) none of these 
A) 20 degrees C. 
B) 273 degrees C. 
C) 293 degrees C. 
D) 566 degrees C. 
E) none of these

Question 7

A container of air is at atmospheric pressure and 27 degrees C.To double the pressure in the container,it should be heated to

Accepted Answer

A) 54 degrees C. 
B) 300 degrees C. 
C) 327 degrees C. 
D) 600 degrees C. 
E) none of these 
A) 54 degrees C. 
B) 300 degrees C. 
C) 327 degrees C. 
D) 600 degrees C. 
E) none of these

Question 8

A quantity of water has more entropy when it is

Accepted Answer

A) frozen ice. 
B) boiling. 
C) at room temperature. 
A) frozen ice. 
B) boiling. 
C) at room temperature.

Question 9

The ideal efficiency for a heat engine operating between temperatures of 2700 K and 300 K is

Accepted Answer

A) 10%. 
B) 24%. 
C) 80%. 
D) 89%. 
E) none of these 
A) 10%. 
B) 24%. 
C) 80%. 
D) 89%. 
E) none of these

Question 10

When a volume of air is compressed and no heat enters or leaves,the air temperature will

Accepted Answer

A) increase. 
B) decrease. 
C) remain unchanged. 
A) increase. 
B) decrease. 
C) remain unchanged.

Question 11

One hundred joules of heat is added to a system that performs 60 joules of work.The internal energy change of the system is

Accepted Answer

A) 0 J. 
B) 40 J. 
C) 60 J. 
D) 100 J. 
E) None of the above choices are correct. 
A) 0 J. 
B) 40 J. 
C) 60 J. 
D) 100 J. 
E) None of the above choices are correct.

Question 12

An adiabatic process is characterized by the absence of

Accepted Answer

A) entropy. 
B) pressure change. 
C) heat exchange. 
D) temperature change. 
E) None of the above choices are true. 
A) entropy. 
B) pressure change. 
C) heat exchange. 
D) temperature change. 
E) None of the above choices are true.

Question 13

The amount of energy ultimately converted to heat by a light bulb is about

Accepted Answer

A) 15%. 
B) 30%. 
C) 45%. 
D) 60%. 
E) 100%. 
A) 15%. 
B) 30%. 
C) 45%. 
D) 60%. 
E) 100%.

Question 14

A volume of air has a temperature of 0 degrees Celsius.An equal volume of air that is twice as hot has a temperature of

Accepted Answer

A) 0 degrees C. 
B) 64 degrees C. 
C) 100 degrees C. 
D) 273 degrees C. 
E) None of the above choices are correct. 
A) 0 degrees C. 
B) 64 degrees C. 
C) 100 degrees C. 
D) 273 degrees C. 
E) None of the above choices are correct.

Question 15

A heat engine would have 100 percent efficiency if its input reservoir were

Accepted Answer

A) 100 times hotter than the exhaust sink. 
B) 1000 times hotter than the exhaust sink. 
C) 100 times cooler than the exhaust sink. 
D) any finite temperature if the exhaust sink were at absolute zero. 
E) at any finite temperature regardless of the heat sink temperature. 
A) 100 times hotter than the exhaust sink. 
B) 1000 times hotter than the exhaust sink. 
C) 100 times cooler than the exhaust sink. 
D) any finite temperature if the exhaust sink were at absolute zero. 
E) at any finite temperature regardless of the heat sink temperature.

Question 16

When an ideal gas is subjected to an adiabatic process

Accepted Answer

A) no work is done on the gas. 
B) the temperature of the gas does not change. 
C) the internal energy of the gas does not change. 
D) Choices A,B,and C are all true. 
E) None of the above choices are true. 
A) no work is done on the gas. 
B) the temperature of the gas does not change. 
C) the internal energy of the gas does not change. 
D) Choices A,B,and C are all true. 
E) None of the above choices are true.

Question 17

As a system becomes more disordered,entropy

Accepted Answer

A) increases. 
B) decreases. 
C) remains the same. 
A) increases. 
B) decreases. 
C) remains the same.

Question 18

When a volume of air expands against the environment and no heat enters or leaves,the air temperature will

Accepted Answer

A) increase. 
B) decrease. 
C) remain unchanged. 
A) increase. 
B) decrease. 
C) remain unchanged.

Question 19

Suppose you rapidly stir some raw eggs with an eggbeater.The temperature of the eggs will

Accepted Answer

A) increase. 
B) decrease. 
C) remain unchanged. 
A) increase. 
B) decrease. 
C) remain unchanged.

Question 20

The lowest temperature possible in nature is

Accepted Answer

A) 0 degrees C. 
B) -273 degrees C. 
C) 4 K. 
A) 0 degrees C. 
B) -273 degrees C. 
C) 4 K.

Exam 18: Thermodynamics

Suppose you put a closed,sealed can of air on a hot stove burner.The contained air will undergo an increase in

Two identical blocks of iron,one at 10 degrees C and the other at 20 degrees C,are put in contact.Suppose the cooler block cools to 5 degrees C and the warmer block warms to 25 degrees C.This would violate the

The first law of thermodynamics is a restatement of the

When mechanical work is done on a system,there can be an increase in

The ideal efficiency for a heat engine operating between the temperatures of 227 degrees C and 27 degrees C is

Consider a piece of metal that is at 10 degrees C.If it is heated until it has twice the internal energy,its temperature will be

A container of air is at atmospheric pressure and 27 degrees C.To double the pressure in the container,it should be heated to

A quantity of water has more entropy when it is

The ideal efficiency for a heat engine operating between temperatures of 2700 K and 300 K is

When a volume of air is compressed and no heat enters or leaves,the air temperature will

One hundred joules of heat is added to a system that performs 60 joules of work.The internal energy change of the system is

An adiabatic process is characterized by the absence of

The amount of energy ultimately converted to heat by a light bulb is about

A volume of air has a temperature of 0 degrees Celsius.An equal volume of air that is twice as hot has a temperature of

A heat engine would have 100 percent efficiency if its input reservoir were

When an ideal gas is subjected to an adiabatic process

As a system becomes more disordered,entropy

When a volume of air expands against the environment and no heat enters or leaves,the air temperature will

Suppose you rapidly stir some raw eggs with an eggbeater.The temperature of the eggs will

The lowest temperature possible in nature is

About Science

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