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Physics-

General

Easy

Question

A bubble of 8 mole of helium is submerged at a certain depth in water. The temperature of water increases by $30 ℃$ . How much heat is added approximately to helium during expansion?

4000 J
3000 J
3500 J
4500 J

The correct answer is: 3000 J

Heat added to helium during expansion
$H equals n C subscript V end subscript increment T equals 8 cross times fraction numerator 3 over denominator 2 end fraction R cross times 30 blank open parentheses C subscript V end subscript f o r blank m o n o a t o m i c blank g a s equals fraction numerator 3 over denominator 2 end fraction R close parentheses$
= $360 blank R$
= $360 cross times 8.31 blank J$ ( $R$ = $8.31 blank J blank m o l to the power of negative 1 end exponent minus K to the power of negative 1 end exponent right parenthesis$
$almost equal to$ 3000 J

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