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## Homework Statement

The problem statement is to find the heat of formation of NH

_{4}CL using the calculated variables and two more reactions.

If I calculated it correctly the H

_{F}for ammonia plus hydrochloric acid to be -247.7kj/mol. I am not sure what else it is that I need to do.

## Homework Equations

I am not sure how I am supposed to calculate delta H to begin with, I think that's where my problems are laying at the moment.