Pressure, volume and temperature all vary during the transformation
7. In an isothermal gas transformation...?
A constant temperature is maintained
A constant pressure is maintained
A constant volume is maintained
Pressure, volume and temperature all vary during the transformation
8. In an isochoric gas transformation...?
Pressure, volume and temperature all vary during the transformation
A constant volume is maintained
A constant temperature is maintained
A constant pressure is maintained
9. In an adiabatic gas transformation...?
A constant temperature is maintained
A constant pressure is maintained
Pressure, volume and temperature all vary during the transformation
A constant volume is maintained
10. In real gases at extremely high pressures...?
The kinetic model still applies
The kinetic model no longer applies because the forces between the molecules are no longer negligible
The pressure will be less than expected.
The gas will not begin to condense
11. The internal energy of an ideal gas is...?
Equal to the highest kinetic energy of the gas molecules
The average kinetic energy of the molecules in the gas
The sum of all the kinetic energy of all the molecules in the gas
Equal to the heat energy transferred to the gas
12. The zeroth law of thermodynamics states that...? (where T1, T2 and T3 are temperatures of bodies)
If T1 > T2 and T2 < T3 then T1 < T3
If T1 = T2 and T2 = T3 then T1 = T3
If T1 < T2 and T2 < T3 then T1 < T3
If T1 > T2 and T2 < T3 then T1 = T3
13. The first law of thermodynamics states...? (Where Q is the heat added (J), ΔU is the internal energy of the gas (J) and W is the work done by the gas (J))
Q = U - ΔW
Q = ΔU + W
Q = U + ΔW
Q = ΔU - W
14. The work done by a gas in a cylindrical piston is given by the equation...? (Where W.D is the work done (J), P is the pressure (kPa), A is the area of the piston (m^2) and Δd is the displacement of the cylinder (m))
W.D = PAΔd
W.D = (PA) / (Δd)
W.D = (Δd) / (PA)
W.D / P = Δd / A
15. If the volume of a gas increases, the gas is doing work, meaning W.D is a positive value
True
False
16. If the temperature of a gas increases, the internal energy of the gas is increasing, meaning ΔU is a positive value
True
False
17. In a thermodynamic cycle, such as in an engine, net work is done on the gas
False
True
18. The Carnot Cycle consists of only...?
Adiabatic changes
Isobaric and adiabatic changes
Isothermal and adiabatic changes
Isochoric and adiabatic changes
19. What is meant by the term Entropy?
Entropy is the free energy gained in heating a system
Entropy is the tendency of all processes to cause a decrease in disordered (dispersed) energy
Entropy is the tendency of all processes to cause an increase in disordered (dispersed) energy
Entropy is the total energy of the molecules of a gas
20. The second law of thermodynamics states that...?
Entropy (S) is a measure of the change in temperature (T) per joule of energy (Q) added to a system: S = ΔT / Q
It is impossible to convert heat completely into work since entropy is always increasing
Heat can be completely converted into work since entropy is always decreasing
