An ideal gas of N molecules is enclosed in a container at a constant pressure p. The graph between volume of gas and its absolute temperature is a straight line. What is the gradient of the graph?
Correct answer: C. Nk/p
- A. NR/p
- B. NRp
- C. Nk/p
- D. Nkp
Explanation
We know that PV= NkT where P is the pressure and k is the Boltzman constant PV= NkT V= NkT/P V= (Nk/P)T (1) Equation of a straight line =Y = mx + c (2) comparing (1) and (2) Y = V c = 0 x = T and m (gradient) = (Nk/P)
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About Thermal Equilibrium and Heat
Thermal equilibrium means that bodies in contact have the same temperature and no net heat flows between them. The topic distinguishes heat from temperature, uses the zeroth law of thermodynamics, and covers heat transfer, specific heat capacity, thermal expansion and the conditions for reaching equilibrium.
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