A constant volume and mass of helium gas at 77°C is heated so that the pressure of the gas doubles. What is the new temperature of the gas in Celsius degrees?
A) 154°C
B) 273°C
C) 427°C
D) 700°C

Question

Quizplus · Accepted Answer

The relationship between pressure and temperature for a gas at constant volume is given by Gay-Lussac's law, which states that the pressure of a gas is directly proportional to its temperature in Kelvin. If the pressure doubles, the temperature in Kelvin also doubles. Starting from 77°C, which is 350K (77 + 273), doubling the temperature gives 700K, which is equivalent to 427°C (700 - 273).

A Constant Volume and Mass of Helium Gas at 77°C