If there is no exchange of energy and matter both, between the system and surrounding, it is known as:
Correct answer: C. Isolated system.
- A. Open system.
- B. Closed system.
- C. Isolated system.
- D. Heterogeneous system.
Explanation
The correct answer is an Isolated system because it does not allow the transfer of energy or matter between the system and its surroundings. This is in contrast to an Open system, which exchanges both energy and matter, and a Closed system, where only energy may be exchanged. A Heterogeneous system is unrelated to the context of energy and matter exchange, as it simply refers to a system with multiple phases or components.
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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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