Aresearch balloon at ground level contains 12 l of helium (he) at a pressure of 725mmhg and a temperature of 30.00∘c. when the balloon has risen to its highest altitude, the volume increases to 28 l and the pressure decreases to 252 mmhg. what will be the temperature of the gas under these conditions?

The temperature when the volume and pressure has changed is -27.26°C

Explanation:

To calculate the temperature when pressure and volume has changed, we use the equation given by combined gas law. The equation follows:

where,

are the initial pressure, volume and temperature of the gas

are the final pressure, volume and temperature of the gas

We are given:

Putting values in above equation, we get:

Converting this into degree Celsius, we get:

Hence, the temperature when the volume and pressure has changed is -27.26°C