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thermo question

75g of Bovine Brain extract was heated from 277 K to 310 K at constant pressure by supplying 125 kJ of energy as heat. Calculate q, ?H and the heat capacity of the sample. The answer is 3788 J K-1. Any idea how to get there?? Thanks!

Reply 1

KissMyArtichoke

Hahaha whoever wrote that question is a legend! Where did you find it?
Sorry, i've love to help but i've forgotten the formula :confused:

Once you find that just rearrange it and put in what you know.

Reply 2

<3 tan xxxxx

Original post by KissMyArtichoke

Hahaha whoever wrote that question is a legend! Where did you find it?
Sorry, i've love to help but i've forgotten the formula :confused:

Once you find that just rearrange it and put in what you know.

haha got it off my teacher! :s thanks anyway!

Reply 3

KissMyArtichoke

Original post by <3 tan xxxxx

haha got it off my teacher! :s thanks anyway!

I'll look at this tomorrow if you still need help, I just need to dig up my old AS book.

Reply 4

gingerbreadman85

E=mcdT

so you've got the mass, the temperature change and the energy, specific heat is just a simple substitution.

for dH you'd then need the Mr and mass of the fuel.