If water is present in a cup placed on a table, what will be the system in this case?
Correct answer: A. Water
- A. Water
- B. Water in cup
- C. Whole table
- D. All of these
Explanation
In thermodynamics, a state of matter that is confined by some walls in space and separated from surroundings by those walls is called a system. In the given example, the cup acts as the wall and the place where the cup is kept is considered as the surrounding, while water that is filled in the cup acts as a system.
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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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