An ideal gas is placed in a tall cylindrical jar of cross-sectional area 0.080m2. A frictionless 0.10-kg movable piston is placed vertically into the jar such that the pistons weight is supported by the gas pressure in the jar. When the gas is heated (at constant pressure) from 25oC to 55oC, the piston rises 1.0cm. How much heat was required for this process? Assume atmospheric pressure outside.