Question

How much heat is needed to raise the temperature of 50 g of a substance by 15°C when the specific heat is 0.92J/g-°C?
345 J
65J
690J
350J

Answer 1

To answer this question, we can use the formula of E=mc△T.
E is the energy needed, m is the mass, c is the specific heat capacity, and △T is the temperature change.

We can simply substitute the numbers and we can calculate the final answer.

E = 50 x 0.92 x 15
E = 690 J

Therefore, your answer is C, 690J.

Answer 2

Answer:

To answer this question, we can use the formula of E=mc△T.

E is the energy needed, m is the mass, c is the specific heat capacity, and △T is the temperature change.

We can simply substitute the numbers and we can calculate the final answer.

E = 50 x 0.92 x 15

E = 690 J

Therefore, your answer is C, 690J.

Explanation: