18.) During an isothermal expansion, a confined ideal gas does
150 J of work against its surrounding. This implies that
(a) 150 J of heat has been added to the gas
(b) 150 J of heat has been removed from the
gas
(c) 300 J of heat has been added to the gas
(d) No heat is transferred because the process is isothermal
(AIPMT 2011)
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Answer:
a. 150 joule of heat has been added to the gas
Explanation:
Q = W + Change in internal energy
In isothermal process change in internal is zero.
So
Q = W
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