There are two containers, A and B, of equal size. Gas that behaves ideally is in
ID: 1590196 • Letter: T
Question
There are two containers, A and B, of equal size. Gas that behaves ideally is in both containers and it is known that A has a temperature of 52oC and B a temperature of 9.0oC. Nothing else is known about the gasses. Which of the following statements must be true? Which could be true? (a) The pressure in A is higher than in B. (b) There are more molecules in A than in B. (c) A and B cannot contain the same type of gas. (d) The molecules in A interact with each other more than those in B interact with each other. (e) The molecules in A have more average kinet- ic energy per molecule than those in B. (f) The molecules in A are moving faster than those in B. Explain your reasoning behind your answers.
Explanation / Answer
use Idea gas equation PV = nRT
Work Done W = KE = PdV = nRT
so
Enerry E = 3/2 KT
since for A, T = 52 deg and for B, T = 9 deg
KE of A will be more than KE of B
so option E is correct,
i,e (e) The molecules in A have more average kinet- ic energy per molecule than those in B.