Go Back   Chemistry Help Forum > Chemistry Forums > Undergraduate Chemistry Forum

Undergraduate Chemistry Forum Ask your undergraduate chemistry questions here.

Thread Tools Display Modes
Old Feb 15th 2018, 03:37 PM   #1
Junior Member
Join Date: Feb 2018
Location: arizona
Posts: 1
godofwar is on a distinguished road
Post How to calculate final temperature question.

Hi, I am new to this forum. I am not pretty sure about the answer i got so i came to here in order to get help.

Iceman, a member of the Marvel superhero team known as the X-men,enters a friendly duel with the Human Torch (Fantastic Four), and gets hit by a fireball worth 562kJ. Ice man is 145lbs and has a body temp of -20C. If Iceman absorbs all of the energy from the fireball, what is Icemanís final body temperature? Support your answer with calculations.

334 J/g Heat of fusion (Hf) (melting or freezing)
2260 J/g Heat of vaporization (Hv) (evaporating or condensing)
2.10 J/g˚C Heat capacity (c) of solid water
4.18 J/g˚C Heat capacity (c) of liquid water
2.2lbs = 1.0kg

Hint: Iceman is made of water; what phase is water at his current body temperature?

This is what i got;


(562000)/(65.8(4.18))= T2-20

T2=22.043 C*

Am i right or whats wrong with it?
godofwar is offline   Reply With Quote
Old Feb 15th 2018, 08:08 PM   #2
Join Date: May 2017
Location: thailand
Posts: 77
oz93666 is on a distinguished road
First we need his mass ....145/2.2 = 65.9K gms

Heat capacity of ice is 2.1 .....

Heat capacity of Iceman = 65.9 x2.1 KJ/C = 138.4 KJ /C

So it takes 138.4KJ to raise icemans temp 1C

The fireball is 562KJ ...divide by 138.4 = 4.06 deg C temp rise
oz93666 is offline   Reply With Quote

  Chemistry Help Forum > Chemistry Forums > Undergraduate Chemistry Forum

Thread Tools
Display Modes

Facebook Twitter Google+ RSS Feed