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In a bomb calorimeter , volume is constant. Do you think thatDeltaH = DeltaU? Why or why not ? |
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Answer» Solution :No, `DeltaH cancel(=) DeltaU`. This is BECAUSETHE relation `DeltaH = DeltaU + P DeltaV` holds good only at constant PRESSURE. This may be seen as FOLLOWS `:` `H =U +P Delta V :. Delta H= Delta U + Pdelta V + V DeltaP` At constant pressure, `Delta p = 0 ,:.DeltaH = Delta U +P DeltaV` At constant VOLUME, `Delta V = 0 , ,' DeltaH = Delta U + VDeltaP` |
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