Asked by Jeena

A metal rod is made of 26kg of iron, how much heat must be supplied to the radiator to raise its temperature from 25 Celsius to 55 Celsius?
My answer is
Q= 350, 220J

Follow up question
If a boiler generateswater at 79.5 Celsius what mass of water is needed to provide the heat required in the previous problem?
Answered by bobpursley
On the first, depends on whay you used as specfic heat capacity. I used .46kJ/kgC, and got 358kJ
I dont understand on the second the question, as what is the initial temp of the water. It makes no sense to me.
Answered by Jeena
The first and second question are related sir. But i cant see the use of the initial temp on the second question. To solve for the mass on the 2nd question what change in temp will i use?
Answered by bobpursley
I agree, you need water initial temp. I am also confused calling it a boiler generating water. Boilers generate steam.
Answered by Jeena
Youre right sir. Am i going to use this eqn
Q=mc deltaT
Where my change in temp will be 79.5-55 C?
Answered by bobpursley
Again, maybe, I have no idea what it meant.
Answered by Jeena
Okay thank you sir
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