As shown in Fig. P3.124, a pistoncylinder assembly whose
Chapter 3, Problem 3.124(choose chapter or problem)
As shown in Fig. P3.124, a piston–cylinder assembly whose piston is resting on a set of stops contains 0.5 kg of helium gas, initially at 100 kPa and \(25^{\circ} \mathrm{C}\). The mass of the piston and the effect of the atmospheric pressure acting on
the piston are such that a gas pressure of 500 kPa is required to raise it. How much energy must be transferred by heat to the helium, in kJ, before the piston starts rising? For the helium, assume ideal gas behavior with \(c_{p}=\frac{5}{2} R\).
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