4. 2. CONDUCTION
Heat energy travels when two
objects at different temperature
are in direct contract with each
other.
During heat conduction, vibrating
atoms / molecules excite the
atoms or molecules next to them.
12. • How much energy is lost by 10 kg of
brass if it is cooled from 35 to 25 C?
38 500 J or about 9200 cal
• It takes 487.5 J to heat 25 grams of
copper from 25 °C to 75 °C. What is the
specific heat in Joules/g·°C?
c = 0.39 J/g·°C