9. Portable butane stoves are often used during camping. Consider using a butane stove to boil some water, 282 kJ of energy was used. This process usually has an efficiency of 92%. a) How much water (in mL) can be boiled from its initial temperature of 15°C to the boiling point of 100°C? Given the specific heat capacity of water is 4.18x10 J/kg°C. b) The heating process takes 11 minutes and the unit cost to use butane is $0.32/kW h. Determine the cost to boil the water.
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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