Chapter 5 Quiz

Tomorrow is a quiz over Chapter 5, Thermochemistry. If you experienced success with the WebAssign set and you understood the pre-lab exercise for the Hess's Law lab , you should be fine with the material on the quiz. Below is a solution to the problem that I had for #8 on WebAssign. I was given three reactions to add together to get a target reaction. I did not use the third equation because two of the substances, water and hydrogen sulfate, are not part of the target equation and could not be factored out. The second equation is reversed and multiplied by two to achieve the correct factoring out. Remember, if a reaction is reversed, the enthalpy sign must be changed. Also, if a reaction is multiplied by some variable, the enthalpy must also be multiplied by that variable. Come and see me tomorrow if you have any questions.