Chemistry-(general)
NEET Chemistry (general) Assertion Reason Question
Type: Assertion Reason-assertion-Medium-Class 11
Assertion (A): For an isothermal expansion of an ideal gas into vacuum, the work done is zero. | Reason (R): In an isothermal expansion into a vacuum, the external pressure is zero.
A
Both (A) and (R) are true and (R) is the correct explanation of (A).
B
Both (A) and (R) are true but (R) is not the correct explanation of (A).
C
(A) is true but (R) is false.
D
(A) is false but (R) is true.
Correct Answer
Option A
Detailed Explanation
In an isothermal expansion of an ideal gas into a vacuum, the external pressure (p_ex) is zero, hence, no work is done (w = 0).
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