The initial volume and pressure of a given mass of gas is V and 3.P. What is its pressure if its volume is increased to 2V at constant temperature?

The initial volume and pressure of a given mass of gas is V and 3.P. What is its pressure if its volume is increased to 2V at constant temperature?
A. 3 P
B. 2P
C. 3/2P
D. 2/3 P

Correct Option: Answer is C
From Boyle’s law, P1V1 = P2V2
P2 = P1V1 / V2
P1 = 3P
V1 = V
V2 = 2V
P2 = 3PV/2V
P2 = 3/2 P

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