Question

At ${100}^{o}C$ a gas has 1 atm pressure and 10 L volume. Its volume at NTP would be:

• A. 10 litres
• B. less than 10 litres
• C. more than 10 litres
• D. none

Answer 1

Answer: (B)

less than 10 litres

At $100℃,P=1atm$

$V=10L$

At NTP, $T=20℃$

$P=1atm$

$PV=nRT$

$V\propto T$

So at NTP temp is less than $100℃$ and as the volume is proportional to temperature.

Thus, the volume will be less than $10L$ as the temperature decreases.