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UNIVERSITI MALAYSIA PERLIS Pusat Pengajian Kejuruteraan Bioproses ERT 108: Physical Chemistry Tutorial 1 1) Calculate CP of 586 g of CH4 (g) at 2000K and 1 bar if CP,m of CH4 at 2000 K and 1 bar is 94.4 Jmol-1K-1 2) Adam and Anthony found that, U m P T 6.08 Jmol 1 atm 1 for air at 28°C and pressures in the range 1 to 40 atm. Calculate U m Vm T for air at: a. 28°C and 1.00 atm b. 28°C and 2.00 atm 3) One mole of He gas essentially independent of temperature expands reversibly from 24.6 L and 300 K to 49.2 L. Calculate the final pressure and the temperature if the expansion is: a. isothermal b. adiabatic Sketch these two processes on a P-V diagram 4) One mole of liquid water at 30°C is adiabatically compressed, P increasing from 1.00 to 10.00 atm. Since liquids and solids are rather incompressible, it is fairly good approximation to take V as unchanged for this process. Calculate q, ΔU, and ΔH for this process.