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 the pressure and number of moles of gas are kept constant, doubling the temperature (T) will result in doubling the product of nR. This means that the volume (V) must also double to keep the equation balanced. Diagram (3) shows the gas expanding to fill a larger volume while maintaining the same pressure and number of moles of gas, which is consistent with doubling the temperature while keeping the other variables constant. Therefore, choice B is the best answer.

Assume That You Have a Sample of Gas in a Cylinder