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
chem F.6 THEROMOCHEMISTRY
2009-03-27 9:46 pm
回答 (1)
2009-03-28 3:42 am
✔ 最佳答案
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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