Work is done on a system with the only result of increasing

Work is done on a system with the only result of increasing the PE of the system. If 6.19 kJ of work are done, what is the change in PE of the system? Express your answer in units of BTUs. (REPORT your answer to 2 decimal places)

Solution

Given change in Potential energy, delta_PE = Work done on the system W = 6.19 kJ

delta_PE = 6.19 x 0.957817 (since 1 kJ = 0.957817)

delta_PE = 5.93 BTU

Hence change in PE of the system is 5.93 BTU