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Phase change problems

Posted: Mon Feb 04, 2019 12:17 pm
by Netpheel Wang 4L
How do you account for phase changes in calculations?

Re: Phase change problems

Posted: Mon Feb 04, 2019 2:43 pm
by Laura Gong 3H
During phase changes, the temperature does not changem so instead of using the equation q=mCdeltaT, use q=ndeltaHfus or q=ndeltaHvap depending on which phase change.

Re: Phase change problems

Posted: Mon Feb 04, 2019 4:22 pm
by Chloe Thorpe 1J
My TA said that it helps to draw out the graph that Lavelle had on the slides showing why steam causes more severe burns than water at the same temperature. When the graph is diagonal, you use the specific heat of the compound. When it is horizontal, you use latent heat in the calculation.