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?

Question

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?

Answer 1

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.

Answer 2

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?

Answer 3

I agree, you need water initial temp. I am also confused calling it a boiler generating water. Boilers generate steam.

Answer 4

Youre right sir. Am i going to use this eqn
Q=mc deltaT
Where my change in temp will be 79.5-55 C?

Answer 5

Again, maybe, I have no idea what it meant.

Answer 6

Okay thank you sir