Question

If the pressure of the gas contained in a closed vessel is increased by 20% when heated by ${273}^{o}C$ then its initial temperature must have been :

• A. $1092K$
• B. 1029 K
• C. ${1365}^{o}C$
• D. 1365K

Answer 1

The correct option is A $1092K$

$\frac{P}{T+273}=\frac{1.2P}{T+273+273}$
$1.2T+273\times 1.2=T+273+273$
$\Rightarrow 0.2T=273\times 0.8$
$T=273\times 4$