Chemistry Forums for Students > Physical Chemistry Forum

heat of brass (show in terms of J/g.oC)

(1/2) > >>

Mikez:
I am having so much trouble with these

1. When 200g of metal at 100oc is placed in 200g of water at 15oC, the final temp. is 23oC. What is heat of metal (show in terms of J/g.oC).

2. A brass kilogram weight at a temperature of 90oC is submerged in 440g of water at 10oC. The final temp. is 24oC. What is heat of brass (show in terms of J/g.oC).

For some reason I am having alot of trouble with these heat questions, if you have any suggestions or resouces on this topic please post them.

thanks

xiankai:
http://www.chemicalforums.com/index.php?board=6;action=display;threadid=7599

Mikez:
Thanks for the link but that is latent heat....and it doesn't answer my second question...

Hunt:
Heat lost = Heat gained
-qlost = qgained
maCa(Tia - Tf) = mbCb(Tf - Tib)

Where a and b represent 2 different substances
C : Heat capacitance
Ti : Initial temp
Tf : Final temp ( same for a and b at Eq )
m : mass ( gram )

It's a matter of forumla, and in both cases, you're required to determine C. ( J/g.Co )

Mikez:
Substances with a lower heat capacity will retain less heat during a heat transfer. -- is this true, because I am not sure. I am trying to make a concluding statement for my lab

Navigation

[0] Message Index

[#] Next page