Use the information to answer the following question. Students are trying to calculate the heat of reaction for the following target reaction.
A + 3B → 3C + 2D
They find the heat of reactions for the two reactions as shown.
A + 2B → C + D ΔH= -20 kJ

B → 2C + D ΔH= -45 kJ

When the students used Hess’s Law correctly, what is the heat of reaction for the target reaction?

A.
+65 kJ

B.
+25 kJ

C.
-65 kJ

D.
-25 kJ

Firstly, the water in the dams hold gravitational potential energy as they are above ground level. the gravitational potential energy is then transferred to kinetic energy as it falls, spinning the turbinethe turbine then spins the generator, which is a large magnet surrounded by metal coils. by doing this, the generator generates electricity. in this action, the energy transfer taken place is kinetic to electric energy