Heat is generated by the core of a nuclear reactor, this heat is removed by pumping cooling water through the core at a rate of 45 x 106 kg/h to generate steam. Cooling water, initially at 30 °C is continuously pumped through the reactor so that the outlet temperature is 748 °C and the core temperature remains constant. Calculate the rate of heat generated by the core of a nuclear reactor (in joules per second). (The specific heat capacity of ice 2100 Jkg 'K 1; water = 4190 Jkg K; steam = 2010 Jkg K. The latent heat of fusion of water is 334 kJ kg: latent heat of vaporisation of water = 2264 kJ kg)
Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
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