How much heat is needed to raise the temperature of 74.0g of octane from 11.4 C to 24.6 C?

Question

How much heat is needed to raise the temperature of 74.0g of octane from 11.4 C to 24.6 C?

Answer 1

We need to know the specific heat for octane. Look it up and then substitute it in the equation below.

q = mC∆T

q = heat = ?

m = mass = 74.0 g

C = specific heat of octane = some # that you look up

∆T = change in temperature = 24.6 - 11.4 = 13.2º

plug in the numbers and solve for q = heat needed (in units of the specific heat, i.e. probably joules)