An insulated cylinder has a piston loaded with a linear spring (spring constant of 600 kN/m) and held by a pin. The cylinder cross-sectional area is 0.2 m2, the initial volume is 0.1 m3, and it contains carbon dioxide at 2.5 MPa, 0C. The piston mass and outside atmospheres add a force per unit area of 250 kPa, and the spring force would be zero at a cylinder volume of 0.05 m3. Now the pin is pulled out; what is the final pressure inside the cylinder?