Urgent Help!!

Merdiemae · #1 $Old$ 05-06-2008, 09:39 PM

Some physical properties of water are shown below.

melting point0.0°Cboiling point100.0°Cspecific heat solid 2.05 J/g·°Cspecfic heat liquid4.184 J/g·°Cspecific heat gas2.02 J/g·°C

H° fusion6.02 kJ/mol

H° vaporization40.7 kJ/mol

How much energy is required to raise the temperature of 27.1 g of water from -12.5°C to 94.5°C?

Merdiemae · #2 $Old$ 05-06-2008, 09:40 PM

I know you have to use Q=MCdeltaT but I still can't get it

abender · #3 $Old$ 05-12-2008, 09:23 AM

heat = mass * specific heat * delta T

heat = (27.1 g)*(4.186 J/gram°C)*(107°C)

Does that work for ya? I am a long time removed from this stuff, and haven't done any of it in ages. You can double check by working backwards.

-Andy