An aluminum rod is 21.3cm long at 37.5°C and has a mass of 864g. If 20,000J of energy is added to the rod by heat, what is the change in length of the rod? Assume the specific heat of aluminum is 900J/kg x °C and the coefficient of linear expansion is 25 x 10^(-6). Answer in units of mm.

Submitted answers were 1.4mm and 0.14mm but both were wrong. (I messed up on conversions the first time but I only have one more chance to submit my answer)