# dago

how much heat is needed to change 20g mercury at 20c into mercury vapor at the boiling point

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1. What?

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2. What does dago tell us about the subject?
q1 = heat to move temperature Hg from 20 C to boiling point.
q1= mass Hg x specific heat Hg x (Tfnal-20).
q2 = heat to vaporize Hg.
q2 = mass Hg x heat vaporization.

total heat = q1 + q2.
Post your work if you need further assistance.

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posted by DrBob222

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