Practice Quiz 2019 (1).pdf

1. What is the name of an ideal-gas process in which no heat is transferred? (a) Isochoric (b) Isothermal (c) Isobaric (d) Adiabatic

Figure 1. 2. In Figure 1, what process is represented by C (a) Isochoric (b) Isothermal (c) Isobaric (d) Adiabatic

A?

3. In Figure 1, what process is represented by B (a) Isochoric (b) Isothermal (c) Isobaric (d) Adiabatic

C?

4. What is the name of an ideal-gas process in which the temperature is constant? (a) Isochoric (b) Isothermal (c) Isobaric (d) Adiabatic 5. What is heat in a thermodynamic process? (a) Heat Q, is the energy transferred between the system and the environment as they interact due to a temperature difference. (b) Heat Q, is the amount of internal energy in an object. (c) Heat Q, is an energy of the system due to the motion of its atoms and molecules. (d) Heat Q, is a state variable that quantifies the “hotness” or “coldness” of a system. 6. What is the name of the following statement: “When two systems A and B are each in thermal equilibrium with a third system C, then A and B are in thermal equilibrium with each other”? (a) First Law of Thermodynamics (b) Second Law of Thermodynamics (c) Mechanical equivalent of heat (d) Zeroth Law of Thermodynamics 7. What statements are true about work and heat? (i) Work done on a system is negative. (ii) Work done by a system is negative. (iii) Positive heat is when energy is transferred into the system from the thermal reservoir. (iv) Negative heat is when energy is transferred into the system from the thermal reservoir. (v) Energy may be transferred into or out of a system as either work W or heat Q. (a) (b) (c) (d)

(i) & (iii) only (ii) & (Iii) only (i), (iii) & (v) only (ii), (iv) & (v) only

8. The First law of Thermodynamics represents the conservation of (a) Linear Momentum (b) Angular Momentum (c) Charge (d) Energy 9. An ideal gas undergoes a free expansion process. Which of the following characteristic is TRUE? (a) ΔEint = -W (b) ΔEint = Q (c) ΔEint = 0 (d) ΔEint > 0 10. Consider the First law of Thermodynamics, where the state of an ideal gas is changed isothermally from state 1 to state 2 as shown in Figure 2. What is the change in the internal energy of the gas during this process?

Figure 2. (a) (b) (c) (d)

ΔEint = W ΔEint = Q ΔEint > 0 ΔEint = 0

11. Which of the following is characteristic of an ideal gas undergoing an adiabatic process? (a) ΔEint = 0 (b) W = 0 (c) Q = 0 (d) ΔV = 0 12. The work done by a system in any thermodynamic process depends (a) on the final AND initial states only. (b) on either the final OR initial state. (c) on the initial and final states OR the path followed by the system between the states. (d) on the initial and final states AND the path followed by the system between the states.