Assume that you have a sample of gas in a cylinder with a moveable piston,as shown in diagram (1).The initial pressure,number of moles,and temperature of the gas are noted on the diagram.Which diagram (2)-(4)most closely represents the result of doubling the temperature while keeping the pressure and number of moles of gas constant?
A)diagram (2)
B)diagram (3)
C)diagram (4)

Question

Assume that you have a sample of gas in a cylinder with a moveable piston,as shown in diagram (1).The initial pressure,number of moles,and temperature of the gas are noted on the diagram.Which diagram (2)-(4)most closely represents the result of doubling the temperature while keeping the pressure and number of moles of gas constant? 
A)diagram (2) 
B)diagram (3) 
C)diagram (4)

Quizplus · Accepted Answer

According to the Ideal Gas Law (PV = nRT), if we double the temperature while keeping pressure and the number of moles constant, the volume of the gas will double as well. This is represented in diagram (3) where the piston has moved up and the volume has increased while pressure and number of moles have stayed constant. Diagram (2) shows an increase in pressure, which would not occur if the pressure is held constant. Diagram (4) shows a decrease in volume, which would not occur if the temperature is doubled while holding the number of moles constant.

Assume That You Have a Sample of Gas in a Cylinder