The work done by 100 calorie of heat in isothermal expansion of ideal gas is

418.4J

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4.184J

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41.84J

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None

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Solution

The correct option is A 418.4J
One calorie is equivalent to $4.184$ joules
or, $J = 4.18 J / c a l$ .
Work done (W)= $= 4.18 \times 500 = 2090 J$
As $1$ calorie is equal to $4.184$ calorie then $100$ calorie is equal to $= 4.184 \times 100 = 418.4$

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