Chemistry help please !!

4mica

4mica

Active member
How many joules are required to heat 692g of nickel from 22c to 318c ?

it gives me the formula Q= (mass) (change in temp) (specific heat)

but i used that and got 90,126.08 which seems way to huge

seriously any help is appreciated ... i wasn't there when she went over this stuff
 
Q=MC delta T

q is in joules

mass is in g

c is the specific heat of the thing

t is the change in temp
 
It is 90,126.08 joules. It makes sense, because you have to raise the temp by a lot, so you would need that many joules.
 
I got 90945.408

Energy Required = M x deltaT x HC

' ' = .692kg x 296C x 444J

= 90945.408

I may be a bit rusty as I haven't taken chem in 2 years, but I think I'm right.
 
Ya the only reason it looks huge is because you have it in Joules. Many times, especially for specific heat related problems, it will be in kJ. 90 kJ or whatever your answer is alot by any means.
 
Your answer is right; it's definately going to take alot of energy to change the temperature of over a half kilo of metal.
 
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