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Calculating Heat
Posted: Sat Feb 04, 2017 11:16 am
by Taylor_Lam_1E
For question 8.41 in the text book, q1 = mCΔT, but for q2 it was mCΔT + nΔHf. Just wondering what the "nΔHf" added to it is for, and why it was needed for this problem as opposed to others.
Re: Calculating Heat [ENDORSED]
Posted: Sat Feb 04, 2017 11:36 am
by Theresa Dinh 3F
It sounds like it's referring to calculating the energy it takes to convert between states of matter.
Re: Calculating Heat
Posted: Sat Feb 04, 2017 5:17 pm
by Mihika Sridhar 3H
Yes, it's definitely referring to the heat needed switch to another state of matter (I.e. Gas to liquid or liquid to solid, calculated with nHf) in addition to the heat needed to get the final state of matter to the desired temperature (that part is just mc(tf-ti)).