Question

Answer this question

Answer 1

Answer:

c + d ---- a + b would probably be exothermic, although it depends on the materials and chemicals used too. This is due to the fact that  a + b and c + d are being used in boht equations. Since they behaved a certain way in one chemical equation, when using the same chemicals, we can expect that the energy given off in the last equation will be the same result for this equation.