Question

A vessel contains one mole of O2 gas at a temperature T. The pressure of the gas is P. An identical vessel containing one hole of He gas at a temperature 2T has a pressure of?

(a) P/8

(b) P

(c) 2P

(d) 8P

Answer 1

The correct choice is (c) 2P

For explanation: PV = nRT or P=nRT/V

For same n, R and V, P is proportional to T

P2/P1 =T2/T1

Or

P2/P=2T/T  or P2=2P.