# ocr a chem question

Watch
Announcements
#1
calculate the temperature change that should be produced when 1kg of water is heated by burning 6 g of coal. assume coal is pure carbon. for carbon delta H = -393.5 kjmol-1

how do i solve?
0
2 years ago
#2
Use q=mc delta t

Delta H = Q / n

Mol Coal = 6/12 = 0.5

-393.5 * 0.5 = Q (in Kj so times by 1000 to get it in Joules which is Q)
Q = 1000 * 4.18 * Delta T
1000 * 4.18 * Delta T = -393.5 * 0.5 * 1000

Delta T = (-393.5*0.5*1000)/(1000*4.18)

Temperature change = 47 degrees
1
#3
could anyone tell me how to calculate
0
X

new posts
Back
to top
Latest
My Feed

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

### See more of what you like onThe Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

### Poll

Join the discussion

#### Do you have the space and resources you need to succeed in home learning?

Yes I have everything I need (43)
64.18%
I don't have everything I need (24)
35.82%