AIIMS 2002
- Exam
- AIIMS
- Year
- 2002
- Subject
- Chemistry
- Chapter
- Thermodynamics (C)
AIIMS 2002 · Chemistry · Thermodynamics (C)
Assertion : Absolute values of internal energy of substances can...
Assertion : Absolute values of internal energy of substances can not be determined.
Reason : It is impossible to determine exact values of constituent energies of the substances.
Options
- AIf both the assertion and reason are true and reason is a correct explanation of the assertion.
- BIf both assertion and reason are true but assertion is not a correct explanation of the assertion.
- CIf the assertion is true but the reason is false.
- DIf both assertion and reason are false.
Correct answer
A. If both the assertion and reason are true and reason is a correct explanation of the assertion.
Step-by-step solution
Internal energy is given by :
Accurate measurement of some forms of energy which contribute to the absolute value of internal energy for a given substance in a given state is impossible. So difference of the initial state and final state is calculated and is denoted by
\Delta E=E_f-E_i