x Turn on thread page Beta
 You are Here: Home

# How to find enthalpy change of reaction from enthalpy change of solution? watch

1. The enthalpy change of solution of Na2CO3 is -35 KJ/mol

The enthalpy change os solution of Na2CO3.10H2O is -60 KJ/mol

Use the above data to find the enthalpy change of reaction for the following reaction:

Na2CO3 (s) + 10H2O (l) ---> Na2CO3.10H2O

I have absolutely no idea what to do. Help would be greatly appreciated.
2. (Original post by ihateocr12345)
The enthalpy change of solution of Na2CO3 is -35 KJ/mol

The enthalpy change os solution of Na2CO3.10H2O is -60 KJ/mol

Use the above data to find the enthalpy change of reaction for the following reaction:

Na2CO3 (s) + 10H2O (l) ---> Na2CO3.10H2O

I have absolutely no idea what to do. Help would be greatly appreciated.
Both dissolution processes produce the same outcome (a solution of sodium carbonate)

Construct a Hess cycle with your unknown equation and the two dissolution equations.
3. (Original post by charco)
Both dissolution processes produce the same outcome (a solution of sodium carbonate)

Construct a Hess cycle with your unknown equation and the two dissolution equations.
I'm really confused as I've only ever done this with enthalpy of formation and combustion. Could you help with this please? thanks
4. (Original post by ihateocr12345)
I'm really confused as I've only ever done this with enthalpy of formation and combustion. Could you help with this please? thanks
Check out this interactive on Hess law

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: March 12, 2016
Today on TSR

### Loughborough better than Cambridge

Loughborough at number one

### Can I date a girl with no boobs?

Poll

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE