Question

A certain amount of an ideal gas is initially at a pressure p₁ and temperature T₁. First, it undergoes a constant pressure process 1-2 such that T₂=3T₁/4. Then, it undergoes  constant volume process 2-3 such that T₃ = T₁/2. The ratio of the final volume to the initial volume of the ideal gas is                                   

      (a) 0.25                           (b) 0.75                        (c) 1.0                             (d) 1.5