Q: If 100g of aluminum (specific heat $0.906 \text{ J/g}^\circ\text{C}$) is heated from $30^\circ\text{C}$ to $100^\circ\text{C}$, how much heat is absorbed?

$q = 100 \times 0.906 \times (100 - 30) = 6,342 \text{ J}$

Question 1

Which of the following best describes a closed system in thermodynamics?

Accepted Answer

Only energy can transfer between the system and surroundings, but not mass.

Question 2

Which property depends on the amount of material present?

Accepted Answer

Extensive property

Question 3

A process that occurs through a continuous series of equilibrium states is called:

Accepted Answer

Reversible process

Question 4

Which of the following is a state function?

Accepted Answer

Internal energy

Question 5

The first law of thermodynamics states:

Accepted Answer

The total energy of the universe is constant.

Question 6

Which equation correctly represents the amount of heat required to raise the temperature of a substance?

Accepted Answer

$q = m s \Delta T$

Question 7

If 100g of aluminum (specific heat $0.906 	ext{ J/g}^\circ	ext{C}$) is heated from $30^\circ	ext{C}$ to $100^\circ	ext{C}$, how much heat is absorbed?

Accepted Answer

$q = 100 	imes 0.906 	imes (100 - 30) = 6,342 	ext{ J}$

Question 8

Which of the following is NOT a correct unit for energy?

Accepted Answer

Watt (W)

Question 9

In calorimetry, the specific heat ($s$) of a substance is defined as:

Accepted Answer

The amount of heat required to raise the temperature of one gram of a substance by one degree Celsius.

Question 10

Which of the following statements about energy flow is correct?

Accepted Answer

Energy always flows from a hotter body to a cooler body.

Question 11

A student claims that the work done by a gas during expansion at constant pressure is given by $w = P \Delta V$. Is this correct?

Accepted Answer

No, the correct formula is $w = -P \Delta V$.

Question 12

Which of the following is an example of an isolated system?

Accepted Answer

A thermos bottle with a tightly sealed cap.

Question 13

Which of the following is a chemical energy change?

Accepted Answer

Combustion of gasoline in a car engine.

Question 14

Which of the following is NOT a state function?

Accepted Answer

Work

Question 15

The amount of heat required to raise the temperature of 1 gram of water by 1 degree Celsius at 1 atmosphere pressure is called:

Accepted Answer

1 calorie

Question 16

Which of the following best describes a reversible process?

Accepted Answer

A process that occurs through a continuous series of equilibrium states.

Question 17

Which of the following is an intensive property?

Accepted Answer

Temperature

Question 18

Which of the following is true about the surroundings in a thermodynamic process?

Accepted Answer

It includes everything except the system.

Question 19

Which of the following is the correct definition of work in thermodynamics?

Accepted Answer

Force exerted over a distance.

Question 20

Which of the following statements about heat capacity is correct?

Accepted Answer

It is the amount of heat required to raise the temperature of a substance by one degree Celsius.

Thermodynamic Processes and Thermochemistry: Key Concepts and Calculations

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