Copper has a specific heat of 0.387 J/g*°C. How much copper is present when 379 J of energy added increases the temperature from 29.6 °C to 63.0 °C?

Question

How much copper is present when 379 of energy added increases the temperature from 29.6 C to 63.0 C?

Answer 1

Use formula Q = mcΔT

Q = energy in joules

m = mass in grams

c = specific heat (joules / grams * celsius)

ΔT = change in temperature (final temperature - initial temperature)

Using the formula, fill in what is given to you in the problem

379 J = m (0.387 J / g °C) (63-29.6)

379 = m (0.387)(33.4) <- simplified without units as above

Solve for unknown 'm' using algebra, isolate the variable!

379 / (0.387)(33.4) = m

m = 29.3 g