A gas in a piston-cylinder device is compressed such that the pressure-volume trajectory follows a polytropic path, p1V1^n = p2V2^n. The subscripts 1 and 2 indicate the beginning and end of the process. Where n = 1.3. If the initial pressure is 1 bar and the initial volume is 1 m^3, and the final volume is 0.1 m^3, calculate the work done on the gas. Give your answer in kJ.