Homework Help: Chemistry

Posted by Raven on Wednesday, May 19, 2010 at 5:51pm.

What mass of copper solid, initially at 25oC,should be added to 100 g of steam, initially at100oC, if we want exactly half of the steam to
condense?

The specific heat of copper
is 0.385 J g-1 oC-1.
For water, the heat of
vaporization is 2257 J g−1.

Chemistry - DrBob222, Wednesday, May 19, 2010 at 8:21pm
[mass Cu x specific heat Cu x (Tfinal-Tinitial)] + [mass steam x delta Hvap]=0

Substitute the numbers and solve for mass Cu which is the only unknown in the equation.

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