A sample of gas occupies 100ml at 27 degree Celsius and 740mm pressure. The temperature the gas will have,when its volume is changed to 80ml at 740mm pressure is?

Answer 1

Only volume and temperatures change, pressure remains constant, Charles's law applies.

V1/T1=V2/T2

Temperatures must be converted to °K.
V1=100 ml
T1=27°C=300.15°K
V2=80 ml.

The above applies when the volume change is at constant pressure to avoid work done during reduction in volume.

Answer 2

240