The figure shows PV-diagram of 0.0040 mole of ideal H2 gas. The temperature of t
ID: 3896319 • Letter: T
Question
The figure shows PV-diagram of 0.0040 mole of ideal H2 gas. The temperature of the gas does not change during segment bc. (a) What volume does this gas occupy at point c? (b) Find the temperature of the gas at points a, b and c. (c) How much heat went into or out of this gas during segments ab, ca and bc? Indicate whether the heat has done into or out of the gas. (d) Find the change in the internal energy of this hydrogen during segments ab, bc and ca. Indicate whether the internal energy increased or decreased during each of these segments.
Explanation / Answer
a)
Tb= Tc
pv/nR = pv/nR
2 * 0.2 = 0.5 * v
v=0.8 L
b)
use ideal gas eqn
pv = n R t
we know p , v ,n at each point just put value and get answer (use R =0.082)
c)
heat = n c dt
internal energy = heat - work
work = p dV