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How to calculate heat of reaction of a single replacement reaction?

by Austin
Tags: heat, reaction, replacement, single
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Austin
#1
May16-14, 04:42 PM
P: 10
In lab I am doing a series of single replacement reactions and I am curious how to calculate the heat of reaction for single replacement reactions and what measurements to take so I can calculate it?
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bitbot
#2
May16-14, 06:08 PM
P: 3
Since you're doing a lab I would assume that you were already taught the relevant equations and procedures...

Anyways, I think you should provide more details about the reaction.

What are the reagents? What are the phases of the reactants? Catalysts?

Details like these are important in order to determine the ΔHrxn.

As a refresher, the most common equations used to find the ΔHrxn are
  • ΔH=∑ΔvpΔHf(products)−∑ΔvrΔHf(reactants)
  • ΔH=q=mcΔT
Austin
#3
May16-14, 08:35 PM
P: 10
I plan on mixing CuSO4 and Iron in water and I know that for calorimetry you use deltaE=mCdeltaT but I am unsure of how this would work with a single replacement reaction in water? What would be necessary to be able to obtain the overall heat of the reaction BY LAB not theoretical

Austin
#4
May16-14, 08:41 PM
P: 10
How to calculate heat of reaction of a single replacement reaction?

To make more clear what I am trying to ask (sorry for not asking clearly) is:
Would it give me the correct heat of reaction if I put Iron and CuSO4 in water...recorded the change in temperature and used DE=mCDT?

But once I find DeltaE don't I have to do something else to find DeltaH like divide by the number of moles of reactant or something like that I forget??? This is where my confusion is greatest..
Borek
#5
May17-14, 02:55 AM
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Quote Quote by Austin View Post
But once I find DeltaE don't I have to do something else to find DeltaH like divide by the number of moles of reactant
Depends on what you aim at. If at the molar heat of the reaction (which is the most logical thing), then yes.


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