Wednesday
March 22, 2017

Post a New Question

Posted by on Monday, February 4, 2013 at 6:29pm.

What is the value of q when 8.21g of water vaporizes at 373 K? The enthalpy of condensation of water at 373 K is -40.7 kJ/mol.

I tried using the equation q= m x Cs x Delta T, but I never got the right answer which is 18.5 kJ apparently, so I need to find out what I did wrong.

  • Chemistry - , Monday, February 4, 2013 at 8:25pm

    You used the correct formula for calculating q WITHIN a phase; however, the formula to use at a phase change is
    q = mass x heat vap for boiling/condensing.
    q = mass x heat fusion for freezing/melting.

Answer This Question

First Name:
School Subject:
Answer:

Related Questions

More Related Questions

Post a New Question