Question

* A 50 gram sample of an unknown metal warms from 18 to 58 after absorbing 800 joules of energy. what is the specific heat of the metal?

*copper has a specific heat of 0.387 j/g degree celsius. what is the mass of a piece of copper that undergoes a
21.0 C temperature change when it absorbs 721 J of energy?

*How many joules of energy must be absorbed to raise the temperature of 21 grams of water from 25 C TO 30 C

Answer 1

800J = mass x specific heat x (Tfinal-Tinitial). Substitute and solve for sp.h.

721 = mass Cu x sp.h. Cu x delta T.

q = mass H2O x specific heat H2O x (Tfinal-Tinitial)