AIIMS 2003
- Exam
- AIIMS
- Year
- 2003
- Subject
- Chemistry
- Chapter
- Thermodynamics (C)
AIIMS 2003 · Chemistry · Thermodynamics (C)
Assertion : The increase in internal energy (Δ E) for the...
Assertion : The increase in internal energy for the vapourization of one mole of water at and is zero.
Reason : For all isothermal processes, .
Options
- AIf both assertion and reason are true and the reason is the correct explanation of the assertion
- BIf both assertion and reason are true and the reason is not the correct explanation of the assertion
- CIf assertion is true but reason is false
- DIf both assertion and reason are false.
Correct answer
A. If both assertion and reason are true and the reason is the correct explanation of the assertion
Step-by-step solution
At or , the water starts boiling and at this temperature the vaporization of water is an isothermal process.
The internal energy change , depend only on temperature, it follows that at constant temperature, the internal energy of the gas remains constant, i.e. is zero.