True or false? (a) The thermal conductivity k of a phase is an intensive property that depends on T, P, and the composition of the phase. (b) The heat flow rate dq/dt across the yz plane is proportional to the temperature gradient dT/dx at that plane. (c) Fourier’s law of heat conduction holds at very low gas pressures. Solution a) True. Thermal conductivity is an intensive property. An intensive property is a bulk property, meaning that it is a physical property of a system that does not depend on the system size or the amount of material in the system b) True. c) False If you want further explanations, let me know in the comments. I\'d be glad to help. .

1. True or false? (a) The thermal conductivity k of a phase
is an intensive property that depends on T, P, and the composition
of the phase. (b) The heat flow rate dq/dt across the yz
plane is proportional to the temperature gradient dT/dx at that
plane. (c) Fourier’s law of heat conduction holds at very low
gas pressures.
Solution
a) True. Thermal conductivity is an intensive property. An intensive property is a bulk property,
meaning that it is a physical property of a system that does not depend on the system size or the
amount of material in the system
b) True.
c) False
If you want further explanations, let me know in the comments. I'd be glad to help.