State and explain Charles law. Why is pressure kept constant here?
Charle’s law: At constant pressure, the volume of a given mass of a gas increases or decreases by 1/273 of its volume at 0°C for each one-degree rise or fall in temperature.
The mathematical form of Charle’s law:
Vo = volume at 0°C
Vt = volume at t°C
Pressure is kept constant in Charles’ law to isolate the effect of temperature on the volume of a gas, ensuring changes in volume are directly proportional to changes in temperature.