Physics

Physics, 07.11.2019 13:31, johannah51

When the activation energy of an exothermic reaction decreases at a given temperature, the reaction rate increases because the

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Chemistry, 29.06.2019 13:20, sakhya04

In general, what is the relationship between temperature and the reaction rate of a chemical reaction? a. when temperature increases, the number and energy of collisions between particles increases, which increases the rate of the reaction. b. when temperature increases, the activation energy required for the reaction increases, which decreases the rate of the reaction. c. when temperature increases, the reaction becomes more endothermic, which increases the rate of the reaction. d. when temperature increases, the reaction becomes more exothermic, which decreases the rate of the reaction.

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Chemistry, 07.07.2019 06:00, yehnerthannah

When comparing the activation energy between different exothermic reactions, as the activation energy decreases at a given temperature, the reaction rate increases because the

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Chemistry, 16.07.2019 17:20, gudtavosanchez19

Chemical reactions occur when molecules or atoms collide in a way that the bonds between atoms break and new bonds form. breaking the bonds of the reactants requires energy, whereas bond formation releases energy. select the true statements regarding energy changes during a reaction. reactants must collide with proper orientation and with energy greater than or equal to the activation energy for a reaction to occur. the activation energy, , of the forward reaction is the difference between the energy of the products and the energy of the transition state. if the heat of reaction, δ is positive, the energy of the products is lower than the energy of the reactants and the reaction is exothermic. when the activation energy is high, the reaction rate is fast. decreasing the temperature decreases the kinetic energy of the reactants, and the reaction goes more slowly. increasing the concentration of reactants increases the number of collisions, and the reaction goes faster. the energy of a collision between atoms or molecules must be greater than or equal to the activation energy, , for bonds to be broken.

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Chemistry, 23.09.2019 19:00, alyssatamayo641

Which of the following statements is false? a. with all else being equal, the higher the value of ea, the slower the reaction. b. as temperature increases, the activation energy decreases. c. a catalyst speeds up a reaction by providing an alternative mechanism with a lower activation energy d. for a typical reaction at room temperature with an activation energy of about 50 kj/mol, a 10 ºc rise in temperature leads to an approximate doubling of the rate. e. as temperature increases, the number of collisions between reactants also increases.

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