The figure below shows the input and output of material and energy in a copper processing plant. The processing of scrap copper into molten copper in the plant is a two stage process. The temperature of the scrap copper is first raised in the plant to 1088C after which an additional latent heat energy is required to convert it into molten copper. If the specific heat capacity of copper is 0.386 MJ/tonne/degree C, and the specific latent heat of copper is 257.5 MJ/tonne, determine the energy efficiency (as a percentage to 1 d.p) of the plant. 92 360 GJ of energy 41,600 tonnes of crap copper at 25C Copper Processing Plant Molten copper Heat losses