How much energy (in J) is lost when a sample of iron with a mass of 28.3 g cools from 66.0 degrees celsius to 24.0 degrees celsius.

Q = -535 J.

Explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to calculate the lost energy according to the following and generic heat equation:

Thus, since the specific heat of iron is 0.450 in the SI units, we can plug in the mass and temperatures to obtain:

Regards

I'm just guessing here, but from what I've seen on similar problems

2A + 3B ↔ 2C + D

The terms in the right will be the numerator and the terms in the left will be the denominator. The coefficient becomes the exponent.

Kc = [C]² [D] / [A]² [B]³