A substance weighing 1 kg is initially at 25°C. Heat of 11,000 cal of is added to it. What is the final temperature of the substance? The specific heat of the substance is 0.20 cal/g·°C.

Question

Quizplus · Accepted Answer

To solve this problem, we need to use the equation:

Q = mCΔT

Where Q is the heat added, m is the mass of the substance, C is its specific heat, and ΔT is the change in temperature.

First, we need to convert the mass from 1 kg to grams:

m = 1 kg = 1000 g

Now we can rewrite the equation as:

11000 cal = 1000 g × 0.20 cal/g·°C × ΔT

Simplifying, we get:

ΔT = 55°C

Therefore, the final temperature of the substance is:

25°C + 55°C = 80°C

So the answer is B) 80°C.

A Substance Weighing 1 Kg Is Initially at 25°C