An ideal gas is allowed to expand both reversibly and irreversibly in an isolated system. If Ti is the initial temperature and Tf is the final temperature, which of the following statements is correct?
Correct answer: D. (Tf)irreversible > (Tf)reversible
- A. Tf > Ti for reversible process but Tf = Ti for irreversible process.
- B. (Tf)reversible = (Tf)irreversible
- C. Tf = Ti for both reversible and irreversible processes
- D. (Tf)irreversible > (Tf)reversible
Explanation
During the irreversible expansion of an ideal gas in an isolated system (free expansion), the temperature decreases. In reversible expansion, the temperature remains the same. So, the final temperature is higher in the irreversible process compared to the reversible process.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About System, Surroundings and State Functions
A system is the part of the universe under study, while everything outside it is the surroundings; the boundary separates them. State functions such as pressure, temperature, volume, internal energy and enthalpy depend only on the state, unlike heat and work, which depend on the path taken.
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 System, Surroundings and State Functions questions
Which is intensive property?
Change in extensive property is proportional to the change in _ of material.
If the matter in a given system at a given condition is divided into two equal parts, then the value of the extensive properties will become:
A piston in a cylinder is a part of:
Change in entropy doesn't depend on:
Specific heat of water is: