What would be the effect of increase of temperature on pressure, provided the volume is constant?

Correct option is A

Correct Answer: A. Increase

Information Booster

• This relationship is described by Gay-Lussac’s Law, which states:
• At constant volume, the pressure of a gas is directly proportional to its absolute temperature (Kelvin scale).
• Formula:

​$$\frac{P_1}{T_1} = \frac{P_2}{T_2}$$​​

• So, as temperature increases, the kinetic energy of gas molecules increases, causing more frequent and forceful collisions with the container walls — hence, pressure increases.

Additional Information

• Applicable only if the volume is fixed and no gas escapes.
• Real-life examples:
• Pressure cooker: Internal pressure rises with temperature.
• Car tires: Pressure increases on a hot day due to temperature rise.
• Ideal Gas Law:

PV=nRT

• At constant V and n, P ∝ T