A refrigeration system to be installed must be capable of cooling 10,000 lbm of pork should from 40F to 10F in 2 hr. The pork shoulder has a freezing point of 28F, water content of 73%, a specific heat above freezing of 0.86 Btu/lbm-F and below freezing of 0.53 Btu/lbm-F, and thermal conductivity of 0.71 Btu/hr-ft-F. Assuming atmospheric conditions, the capacity the refrigeration system must have is most nearly A) 625,000 Btu/hr B) 635,000 Btu/hr C) 820,000 Btu/hr D) 1,250,000 Btu/hr Why don't we use the latent heat of fusion of the pork and why are we using the latent heat of water