Pressure’s Law states that the pressure of a given mass of gas is directly proportional to its temperature at constant volume.

P ∝ T

P = KT

K = P/T

P1/T1 = P2/T2

**Example**: A given mass of gas exerts a pressure of 90 N/M2 at 27oc, Calculate the temperature at 180 N/M2.

**Solution**

P1/T1 = P2/T2

P1 = 90 N/M21 T2 = 27°C + 273° = 300°K, P2 = 180N/M2

T2 = (P2 x T1)/P1

= (180 x 300)/90

= 600 °K