hi, i am having trouble with this problem: A cylinder with a diameter of 5.04 cm has a movable piston attached to a horizontal spring. The cylinder contains 1.40 liters of an ideal gas at 20.9°C and 0.99 atm pressure. Under these conditions, the spring is unstretched. The temperature of the gas is increased to 95°C and it is found that the spring compresses 3.41 cm. Determine the spring constant k. I am not sure how to relate the change in pressure with a spring constant. So far, I tried finding the new pressure using (P1*V1)/(T1) = (P2*V2)/(T2) like this: (.99atm*1.4L)/(273.15+20.9) = (P2*1.4L)/(273.15+95) and got P2 = 1.239atm How can I use this to find the spring constant? I tried using the eq. P=F/A but then I didn't know the area of the cylinder to use. Could anyone please help me understand this problem better? Thanks!!