Editing Notes On Heat Calculation - College Chemistry

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<center>Notes on Heat Calculations - College Chemistry</center> 
 
Steps to Calculating Heat (Thermodynamic) Problems:

1. Define your system (the substance(s) that are changing).

2.	Write down unknown information (i.e. what you are looking for).

3.	Write down what you know. Remember if you are given heat value (in cal or J) you need to determine the sign of this value: 
*If system is losing heat (giving to surrounding), the heat sign is negative
*If system is gaining heat (absorbing from surrounding), the heat sign is positive
*If you are calculating the heat value, you don't determine the sign your calculations will
4.	Write out the formula that you need to use:
*Phase change (called Latent heat) heat equation:
*Non-phase change (calledSensible heat) heat equation: 
*You mst show deltaH = Tfinal - Tinitial and resulting value & sign
 
5.	Plug the numbers you are given into the formula (show work if you need to convert units into other units. (e.g. grams into kilograms)

6.	Do math. (make sure to have units on all numbers and keep appropriate sig fig and scientific notation). 
 
 
 
 
 
 
 
 
7.	Check answer including correct number of sig figs, scientific notation, and proper units! Remember that the last calculation step determines the method of determining sig figs.

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