An aerospace component made of a polymer composite with a mass of 350 g is cooled in a test chamber to −15∘C-15^\circ\text{C}−15∘C and then heated up to 45∘C45^\circ\text{C}45∘C.
The specific heat capacity of the polymer composite is 0.90 kJ kg-1 K-1.
What is the change in thermal energy of the component during this heating process?
9.45 kJ9.45\text{ kJ}9.45 kJ
14.2 kJ14.2\text{ kJ}14.2 kJ
18.9 kJ18.9\text{ kJ}18.9 kJ
18.9 MJ18.9\text{ MJ}18.9 MJ