Anything which is under observation or experiment is called:
Correct answer: C. System
- A. Universe
- B. Boundary
- C. System
- D. Surroundings
Explanation
The correct answer is Option C: System. In thermochemistry, a system is the specific portion of the universe that is being studied, whether it be a chemical reaction in a beaker or a physical process in a cylinder. The system is distinct from the surroundings, which include everything else that can affect or be affected by the system. A boundary is simply the line that separates the system from the surroundings and does not refer to the area of observation itself. The universe, on the other hand, is too broad a term and includes everything in existence, not just the focus of a particular experiment.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
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.
Practise Thermochemistry and Energetics of Chemical Reactions
728 free Thermochemistry and Energetics of Chemical Reactions MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Thermochemistry and Energetics of Chemical Reactions questions
Which one of the following is NOT the unit of heat:
Change in enthalpy is defined as:
For which of the following reactions the change in enthalpies is equal to the change in internal energy:
Among the following, for which reaction, heat of reaction represents bond energy of all:
∆H,-572kJ/mol-1 for water It means that: