The pressure inside a container is 812 Torr at a temperature of 75 °C. What would the pressure be at 57 °C?

Question

Please show work!

Answer 1

Given:

Initial pressure = P1 = 812 torr

Initial temperature = T1 = 75C + 273 = 348K (temperature must be in Kelvin)

Final temperature = T2 = 57C + 273 = 330K

Asled for:

Final pressure = P2

Assuming the volume and number of moles remains constant, the pressure should decrease as the temperature decreases. Pressure is directly related to temperature (in Kelvin), so we can use

P1/T1 = P2/T2

(812 torr) / 348K = P2 / 330K

P2 = 770 torr