A simple solar energy heater is a glass-topped box containing rocks. Sunlight heats the rocks during the day, and air blown by night to heat the house. The box contains 7.5 x 10^4 g rocks, whose specific heat is 0.49 Jlg°C. How much additional heat can the rocks store when they warm from a night time of 18°C to a daytime temperature of 43°C? *
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.
![Which is true about the rate of consumption of hydrogen peroxide and the
rate of production of oxygen? Refer to the following table. *
Time (seconds)
[H2O2], mM
[02], mM
2
0.925
0.037
30
0.312
0.344
Rate of consumption of H202 = Rate of consumption of 02
Rate of consumption of H202 = 0.5 x Rate of consumption of 02
O Rate of consumption of H202 = 2 x Rate of consumption of 02
O Rate of consumption of H202 = (Rate of consumption of 02)2](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe46f4908-7e86-4492-98b4-f701a1ee6e9f%2F5e4c0008-cbbb-4b61-a043-2dc6061f7d1b%2F3ipzkpc_processed.jpeg&w=3840&q=75)
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