According to Regnault's law at constant pressure the specific heat of gas is the same.
Regnault's law is also called Gay lusac's law.
This states that pressure exerted by a gas is directly proportional to the absolute temperature.
It can be mathematically represented as follows:; ; where P is the pressure and T is the absolute temperature, and K is the constant of proportionality.
Example: A pressure cooker is heated to certain temperature will increases the pressure inside the cooker which helps food to cook faster