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