Posted by **JoJo** on Tuesday, April 10, 2012 at 3:27pm.

12. In a calorimeter, 10 g of ice absorbs heat with an enthalpy of fusion of 334 J/g. What is the heat absorbed?

q = mCHf

I am having a lot of trouble on this type of problem in chem. Help and an explanation would be greatly appreciated. Thank you.

- Chemistry -
**DrBob222**, Tuesday, April 10, 2012 at 3:45pm
When you are moving within a phase (for example, liquid water at one T to liquid water at another T OR ice at one T to ice at another T OR steam at one T to steam at another T), the equation to use is

q = mass x specific heat of the substance in that phase x (Tfinal-Tintial).

When you are at the phase change point (ice or liquid water at zero C) the formula is

q = mass x heat fusion. + if ice to liquid or - if liquid to solid.

When you are at the phase change point at the other end (liquid water or steam at 100 C) the formula is

q = mass x heat vaporization. + if liquid to steam or - if steam to liquid.

In the problem above it is

q = mass x heat fusion

q = 10 g x 334 J/g = 3340 J. Since the ice is absorbing heat it is + 334 J.

- Chemistry -
**JoJo**, Tuesday, April 10, 2012 at 4:07pm
Thanks so much DrBob222. This helped a bunch!

## Answer This Question

## Related Questions

- Chemistry - In a calorimeter, 100 g of ice melts at 0oC. The enthalpy of fusion ...
- Chemistry(explain Please) - How would i find the following? I just need an ...
- Will Someone please respond! Chem - How would i find the following? I just need ...
- chemistry - When ice at 0C melts to liquid water at 0C, it absorbs 0.334 kj of ...
- Chemistry - When ice at 0°C melts to liquid water at 0°C, it absorbs 0.334 kJ of...
- Chemistry - Calculate the amount of heat, in kJ, needed to convert 30.0 g of ice...
- Chemistry - Heat of Fusion of Ice - Conclusion question(s) from a lab we did to ...
- physcial science - When 1 kg of ice at 0 degrees Celsius absorbs 80 kilocalories...
- Physics - A 35-g block of ice at -14°C is dropped into a calorimeter (of ...
- chemistry - Calculate the amount of heat absorbed when 58 g of steam at 117&#...

More Related Questions