Sunday

October 26, 2014

October 26, 2014

Posted by **Julia** on Tuesday, February 22, 2011 at 10:16pm.

I am having trouble figuring out how to solve this.

- Chemistry -
**DrBob222**, Tuesday, February 22, 2011 at 11:49pmI can't help because I'm confused by the problem. How can you have ice at 15 C? You can't. You must have made a typo; I suspect it is -15 C.

Here is the general procedure.

For change of state (change of phase), heat needed is

q = mass x heat fusion (if melting/freezing) or heat of vaporization (if vaporizing/condensing) and if moving within a phase (the same state)

q = mass x specific heat x (Tfinal-Tinitial).

Then total Q = sum of individual qs.

**Answer this Question**

**Related Questions**

Physics - Please Help! I am having difficulties grasping these concepts. Explain...

Physics 20 - 1. How much heat energy is required to change 500 grams of water at...

Chemistry - Calculate the joules of energy involved when 11 grams of water at 10...

PHYSICS 102E - 1. How much ice at -10 degrees Celsius is required to cool a ...

Chemistry - 1. How much heat energy is needed to transform 125g of ice at 0 ...

Chemistry - 1. How much heat energy is needed to transform 125g of ice at 0 ...

Chemistry - How much heat energy is needed to transform 125g of ice at 0 ...

Chemistry - How much heat energy is needed to transform 125g of ice at zero ...

Chemistry - How much heat energy is needed to transform 125g of ice at zero ...

chemistry - Calculate the enthalpy change for converting 10.0g of ice at -25 ...