A vessel of 120 mL capacity contains a certain mass of a gas at 20^(@)C and 750 mm pressure. Thegas was transferred to a vessel whose volume is 180 mL. Calculate the pressure of the gas at 20^(@)C.

A vessel of 120 mL capacity contains a certain mass of a gas at 20^(@)

1.	A vessel of 120 mL capacity contains a certain mass of a gas at 20^(@)C and 750 mm pressure. Thegas was transferred to a vessel whose volume is 180 mL. Calculate the pressure of the gas at 20^(@)C.
Answer» Solution :Since a gas completely fills the vessel in which it is contained, thesefore, we have : `V_(1)=120 mL,V_(2)=180 mL`,`P_(1)=750 mm, P_(2)=?mm` Since the temperature REMAINS CONSTANT, therefore, by applying Boyle's Law, `P_(1)V_(1)=P_(2)V_(2)`