Imagine you want to heat 75.0 grams of water from 60°C to 69°C. You have a device (like a stove) that delivers 500 Joules a minute but with only 40% efficiency. How long (how much time, in minutes) will it take to raise the temperature the 9°C? of the water Type your response
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.
![**Challenge Problems**
**T27HW Question 11 - Challenge**
Imagine you want to heat 750 grams of water from 60°C to 99°C. You have a device (like a stove) that delivers 500 Joules a minute but with only 40% efficiency. How long (how much time, in minutes) will it take to raise the temperature of the water the 9°C?
*Type your response:* [Your answer]
**T27HW Question 12 - Challenge**
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Answer:
This question is based on heat exchange, where heat supplied by stove to water should be equal to heat gained by water during the rise of its temperature.
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