Question

There is $10$ litre of a gas at STP. Which of the following changes keeps the volume constant?

• A. $273$K and $2$ atm
• B. ${273}^o$C and $2$ atm
• C. ${546}^o$C and $0.5$ atm
• D. $0^o$C and $0$ atm

Answer 1

The correct option is B ${273}^o$C and $2$ atm

There is 10 litre of a gas at STP. The changes ${273}^{0}C$ and $2atm$ keeps the volume constant

$PV=nRT$

Hence,$V\propto \frac{T}{P}$(at constant n)

Thus, when both the pressure and temperature is doubled, the volume remains constant.