2 A cube of iron was heated to 70 oc and transferred to abeaker containing 100 g of water at 20 oc. The final temperature of the water and the iron was 23 oc. What are (a) theheat capacity, (b) the specific heat capacity, and (c) the molarheat capacity of the iron cube? Ignore heat losses from theassembly.
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.
2 A cube of iron was heated to 70 oc and transferred to a
beaker containing 100 g of water at 20 oc. The final temperature of the water and the iron was 23 oc. What are (a) the
heat capacity, (b) the specific heat capacity, and (c) the molar
heat capacity of the iron cube? Ignore heat losses from the
assembly.
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