Transfer of heat from hot surroundings to a cold refrigerator is an example of:
Correct answer: A. Spontaneous reaction
- A. Spontaneous reaction
- B. Non-Spontaneous reaction
- C. First law of thermodynamics
- D. All of the above options are correct
Explanation
Spontaneous heat transfer from hot to cold is also known as the second law of thermodynamics. The second law of thermodynamics states that the total entropy of an isolated system (the thermal energy per unit temperature that is unavailable for doing useful work) can never decrease.A spontaneous reaction is a reaction that favors the formation of products at the conditions under which the reaction is occurring. A bonfire is an example of a spontaneous reaction, since it is exothermic (there is a decrease in the energy of the system as energy is released to the surroundings as heat).
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About Thermochemistry and Energetics of Chemical Reactions
Thermochemistry measures energy changes in chemical reactions and distinguishes exothermic from endothermic processes. Work covers systems, surroundings and state functions, internal energy, the first law of thermodynamics, enthalpy and Hess's law, including the sign conventions used when heat enters or leaves a system.
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