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# chem F.6 THEROMOCHEMISTRY

WHAT IS THE FINAL TEMPERATURE OF 14.5G SAMPLE OF NICKEL WHEN COOLED FROM A STARTING TEMPERATURE OF 62.5度RELEASING355J OF ENERGY

LOOK UP THE Cp VALUE FOR NICKEL ON UR PERIODIC TABLE

### 1 Answer

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- vincent_kl_tamLv 41 decade agoFavorite Answer
Let T be the final temperature of 14.5g sample of nickel.

By E=mcΔT

335=(14.5÷58.6934)×26.07×(62.5℃-T)

T=10.5℃ (cor. to 3 sig. fig.)

∴The final temperature of 14.5g sample of nickel is 10.5℃.

2009-03-27 19:46:51 補充：

睇錯咗!

Let T be the final temperature of 14.5g sample of nickel.

By E=mcΔT

355=(14.5÷58.6934)×26.07×(62.5℃-T)

T=7.38℃ (cor. to 3 sig. fig.)

∴The final temperature of 14.5g sample of nickel is 7.38℃.

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