A 900-g iron block is initially at 5°C. Heat of 5,000 cal is added to it. What is the final temperature of the iron block? The specific heat of iron is 0.11 cal/g·°C.

Question

Quizplus · Accepted Answer

First, we need to use the formula for heat:
q = mCΔT
where q is heat, m is mass, C is specific heat, and ΔT is the change in temperature.

We can rearrange this formula to solve for ΔT:
ΔT = q / (mC)

Plugging in the values given in the problem:
m = 900 g
C = 0.11 cal/g·°C
q = 5000 cal

ΔT = 5000 cal / (900 g * 0.11 cal/g·°C)
ΔT = 50°C

Therefore, the final temperature of the iron block is:
5°C + 50°C = 55°C

So, the best choice is C.

A 900-G Iron Block Is Initially at 5°C