Answer to Question #153998 in General Chemistry for Evan Schonasky

Question

A cup of coffee (131 g) cools from 85˚C down to comfortable room temperature 24˚C. How much energy (q) does it release to the surroundings?

Answer 1

q = m c ΔT

q = energy , m = mass = 131g

c = specific hear ( for coffie) = 4.184 J/g ⁰C

ΔT = 85⁰ - 24⁰ = 61⁰ C

q = m c ΔT

q = 131 × 4.184 × 61

q = 33,434.344 joule

q = 33.43 KJ