Question 1

Which of the following best describes the main focus of statistical mechanics in physical chemistry?

Accepted Answer

It bridges the microscopic motion of atoms and molecules to the macroscopic behavior of bulk matter.

Question 2

Which of the following is an example of an extensive thermodynamic property?

Accepted Answer

Mass

Question 3

A system is separated from its surroundings by a wall that allows heat but not matter to pass through. What type of wall is this?

Accepted Answer

Thermally conducting wall

Question 4

Which of the following statements about open, closed, and isolated systems is correct?

Accepted Answer

An open system allows transfer of both matter and energy with its surroundings.

Question 5

A sample of 8.66 g of pure H$$_2O at 1 $$atm and 24$$^	ext{o}C is in a $$beaker. Which of the following is a state function for this system?

Accepted Answer

The mass of H$$_2O$$

Question 6

Which of the following best describes mechanical equilibrium in a thermodynamic system?

Accepted Answer

No unbalanced forces act on or within the system.

Question 7

A system contains two immiscible liquids, H$$_2O $$and CCl$$_4. Is $$this system homogeneous or heterogeneous?

Accepted Answer

Heterogeneous, because there are two phases.

Question 8

Which of the following is an intensive property?

Accepted Answer

Pressure

Question 9

The pressure $$P$$ exerted by a system on its surroundings is defined as:

Accepted Answer

$$P = F/A$$, where $$F is $$the perpendicular force per unit area $$A.$$

Question 10

Which of the following best describes the zeroth law of thermodynamics?

Accepted Answer

If two systems are each in thermal equilibrium with a third system, then they are in thermal equilibrium with each other.

Question 11

A thermometer is constructed using mercury in a glass tube. The temperature $$	heta is $$related to the height $$h of $$mercury in the tube by the linear function $$	heta = aV_r + b$$, where $$V_r is $$the volume of mercury. Why must $$a \u003e 0$$?

Accepted Answer

So that temperature increases as the volume increases.

Question 12

Which of the following statements about temperature is correct?

Accepted Answer

Temperature is a state function that applies only to systems with many particles.

Question 13

Which of the following is true for a system in thermodynamic equilibrium?

Accepted Answer

Its macroscopic properties remain constant with time.

Question 14

A system is separated from its surroundings by a wall that does not allow heat or matter to pass through. What type of wall is this?

Accepted Answer

Adiabatic and impermeable wall

Question 15

Which of the following best describes a closed system?

Accepted Answer

It allows transfer of energy but not matter with its surroundings.

Question 16

Which of the following is a correct statement about the density $$\rho of a $$phase with mass $$m$$ and volume $$V$$?

Accepted Answer

$$\rho = m/V$$

Question 17

Which of the following is NOT a requirement for thermodynamic equilibrium?

Accepted Answer

Constant rate of chemical reaction

Question 18

A gold particle with a radius of 25 nm is chemically reactive, while a bulk gold nugget is not. What does this illustrate about properties at the nanoscale?

Accepted Answer

Properties of materials can change dramatically at the nanoscale.

Question 19

Which of the following is true about the specification of a thermodynamic state?

Accepted Answer

Specifying several properties fixes all other properties.

Foundations of Physical Chemistry: Thermodynamics and Temperature

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