InterviewSolution
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InterviewSolution
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The value of coefficient of volume expansion of glycerin is `5 xx 10^(-4) K^(-1)`. The fractional change in the density of glycerin for a rise of `40^(@)C` in its temperature isA. `0.010`B. `0.015`C. `0.020`D. `0.025` |
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Answer» Correct Answer - C Here, `gamma=5xx10^(-4)K^(-1)= 5xx10^(-4).^(@)C^(-1)` Let, `rho_(2), rho_(1)` be the density of glycerine at temperature `t_(2).^(@)C` and `t_(1).^(@)C` respectively. Then `rho_(2)=rho_(1)[1-gamma(t_(2)-t_(1))]=rho_(1)-rho_(1)(t_(2)-t_(1))` or `(rho_(1)-rho_(2))/(rho_(1))=gamma(t_(2)-t_(1))` Frictional change in density of glycerine `=(rho_(1)-rho_(2))/(rho_(1))= gamma(t_(2)-t_(1))= (5xx10^(-4))xx40` `=0.020` |
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