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  3. CEE Kerala Engineering

CEE Kerala Engineering CEE Kerala Engineering Solved Paper-2008

  • question_answer
    A bubble of 8 mole of helium is submerged at a certain depth in water. The temperature of water increases by\[{{30}^{o}}C\]. How much heat is added approximately to helium during expansion?

    A)  4000 J                  

    B)         3000 J

    C)  3500 J                  

    D)         4500 J

    E)  5000J

    Correct Answer: B

    Solution :

    Heat added to helium during expansion \[H=n{{C}_{V}}\Delta T=8\times \frac{3}{2}R\times 30\] \[\left( {{C}_{V}}for\text{ }monoatomic\text{ }gas=\frac{3}{2}R \right)\] \[=360R\] \[=360\times 8.31\text{ }J\]        (R = 8.31 J/mol-K) \[\approx 3000\text{ }J\]


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