Chemical Forums
1 Hour
1 Day
1 Week
1 Month
Forever
November 16, 2024, 07:07:28 PM
Forum Rules
: Read This Before Posting
Home
Help
Search
Login
Register
Chemical Forums
Chemistry Forums for Students
Physical Chemistry Forum
solving for heat elementary chemistry
« previous
next »
Print
Pages: [
1
]
Go Down
Topic: solving for heat elementary chemistry (Read 11422 times)
0 Members and 1 Guest are viewing this topic.
sasha11
New Member
Posts: 4
Mole Snacks: +0/-0
solving for heat elementary chemistry
«
on:
September 16, 2012, 10:37:37 PM »
When 47.5 J of heat are added to 13.2 g of a liquid, its temperature raises by 1.72 degree Celsius. What is the heat capacity of the liquid?
Q=m·c·Δt
47.5 joules = 13.2g·4.18Joules·1.72°c
47.5 = 94.90272g
Do I divide this I'm not sure if this is right?Can someone point me in the right direction?
Thanks
Logged
UG
Full Member
Posts: 822
Mole Snacks: +134/-15
Gender:
Re: solving for heat elementary chemistry
«
Reply #1 on:
September 16, 2012, 10:45:44 PM »
What does the c stand for in your equation?
Logged
sasha11
New Member
Posts: 4
Mole Snacks: +0/-0
Re: solving for heat elementary chemistry
«
Reply #2 on:
September 16, 2012, 10:55:53 PM »
c stands for specific heat
Logged
UG
Full Member
Posts: 822
Mole Snacks: +134/-15
Gender:
Re: solving for heat elementary chemistry
«
Reply #3 on:
September 16, 2012, 11:19:15 PM »
Yes that is true, but another name for specific heat is the specific heat capacity which is what you want to find. The unknown is c, you need to rearrange your equation to isolate c and then solve using the information given.
Logged
sasha11
New Member
Posts: 4
Mole Snacks: +0/-0
Re: solving for heat elementary chemistry
«
Reply #4 on:
September 16, 2012, 11:35:57 PM »
C=[47.5joules]/[13.2grams·1.72°c]
C= 2.09 j/gc
with scientific digits
I think it will be
C=2.10 j/gc
If I'm wrong tell me where please
Thanx
Logged
UG
Full Member
Posts: 822
Mole Snacks: +134/-15
Gender:
Re: solving for heat elementary chemistry
«
Reply #5 on:
September 16, 2012, 11:43:03 PM »
If the answer comes out as 2.09 then leave as is since all other values are known to three significant figures
Logged
Print
Pages: [
1
]
Go Up
« previous
next »
Sponsored Links
Chemical Forums
Chemistry Forums for Students
Physical Chemistry Forum
solving for heat elementary chemistry