Biography, Science, Technology, Health, History Blogs

Example of heat and thermodynamics Example : Ice in a cold storage melts at a rate of 2.5 kg/hour. When the external temperature is 27˚ C. Find the minimum power output of the motor of the refrigerator which just prevents the ice from melting. Latent heat of fusion of ice = 80 cal/g. Solution :   To prevent melting of ice, heat energy is to be taken out. Heat energy to be removed/hour      mL = 2.5 × 10 3 ×80 cal/hour Heat energy to be removed/sec        Q 2 =( 2.5 × 10 3 × 80 )/( 60   ×   60) =55.55 cal/s                                                                      ...