Calculating Heat Energy & Temperature Change: Seeking Help!

[Vigo]

1.) An iceberg's volume is 2*10^6 m^3. If the temperature of the iceberg is is 250 K and the density is .9998 g/cm^3, how much heat energy would be required to competely melt it?

2.) An object weighs 500 grams and has a specific heat of 2 Joules/g C. The object absorbs 40% of the output of a 1200 watt dryer. How long will it take to raise the object's temperature from -10 C to 20 C?

Please help me with these problems. My teacher gave them to us for extra credit because he hasn't taught us how to do them. I could really use some extra credit in that class. Thanks.

 

[Andrew Mason]

1.) An iceberg's volume is 2*10^6 m^3. If the temperature of the iceberg is is 250 K and the density is .9998 g/cm^3, how much heat energy would be required to competely melt it?

2.) An object weighs 500 grams and has a specific heat of 2 Joules/g C. The object absorbs 40% of the output of a 1200 watt dryer. How long will it take to raise the object's temperature from -10 C to 20 C?

Please help me with these problems. My teacher gave them to us for extra credit because he hasn't taught us how to do them. I could really use some extra credit in that class. Thanks.

I would suggest that you read ahead in the textbook or the web (eg. http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/phase.html#c1")on specific heat and "heat of fusion" of water first and then try them.

AM