Question

1. What is the thermal energy change of carbon if a 120 kg sample changes temperature

from 15.0 C to 45.0 C?

Answer 1

Step-by-step explanation:

Given:

m = 120 kg

c = 500 J / (kg·°C)

t₁ = 15.0 °C

t₂ = 45.0 °C

____________

Q - ?

Q = c·m·(t₂ - t₁)

Q = 500·120·(45.0 - 15.0) = 1 800 000 J or 1.8 MJ