In a first-order reaction, what is the rate constant if the rate is 0.050 moles/l-sec and the reactant concentration is 0.030 moles/l

The half-life () is a timescale on which the initial population is decreased by half of its original value, represented by the following equation. This indicates that the half-life of a first-order reaction is a constant. Figure 2: Half lives graphically demonstrated for first-order reaction.

Explanation:

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.