A sample consisting of 1.0 mol of a a Van der walls is compressed from 20.0dm3 to10.0 dm3 at 300K. In the process, 20.2KJof workis done on the gas . Given u ={(2a/RT) - b}/Cp,m; with Cp,m = 38.4j/K.mol; a=3.60dm6 atm and b= 0.44 dm3.mol. calculate DeltaH for the process.