'Substance takes 4 minutes' presentation slideshows

Energy Changes & Phase Changes

Energy Changes & Phase Changes. Heating & Cooling Curves. It takes energy to heat stuff up!. For a pure substance in a single phase , we can calculate how much using Q = mC ?T. Q = energy in Joules m = mass in grams C = specific heat capacity ?T = change in temperature = T f - T i

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What is the melting point of this substance?

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Calculating Energy Changes at Phase Changes

Calculating Energy Changes at Phase Changes. heating rate = 150 J/min. If the substance takes 4 minutes to melt, how much heat energy was used to melt it?. 150J/min x 4min = 600J. What is the melting point of this substance?. 50?C. The boiling point?. 100?C. Heat of Fusion.

269 views • 15 slides