Three groups of drugs are used to reduce the stickiness of platelets, thus preventing platelets from clumping together to form platelet plugs. The anti-platelet drugs are most effective in preventing abnormal blood clots from forming in arteries (as opposed to veins). Aspirin and dipyridamoleâ (Aggrenox).
In order to react, colliding molecules must have a total kinetic energy equal to or greater than some minimum value [Figure 14.13(b)]. The minimum energy required to initiate a chemical reaction is called the activation energy, Ea. The value of Ea varies from reaction to reaction.
Classify this reaction as endothermic or exothermic. 5. Consider the reaction A + 2B â C. In this reaction, the total energy of the reactants is 80 kJ mol-1, the total energy of the products is -90. kj mol-1 and the activation energy for the forward reaction is 120 kj mol-1. a. Draw a diagram of the energy profile for this reaction. Label the diagram. B State whether the reaction is endothermic or exothermic.