During an endothermic reaction, what is the source of energy that causes the reaction to continue?

An endothermic reaction is a chemicalreaction in which more energy is needed to break bonds in the reactants than is released when new bonds form in the products. A constant input ofenergy, often in the form of heat, is needed to keep an endothermic reaction going.

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".