What is the velocity of a ball falling with 100 joules

Kinetic energy = 0.5*m*velocity square.

solving we get velocity =10 metre /sec

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

b.false that your answer