Chemistry

Chemistry, 19.10.2019 08:00, ogpuhl

Activation energy is only required to start an exothermic reaction. true or false?

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Chemistry, 16.07.2019 07:00, Naysa150724

Me asap you! shiloh wanted to observe the changes that occurred during an exothermic reaction. he monitored the changes and placed them in a chart. which statement best describes his data? the activation energy was reached at 10: 45 a.m. without the additional energy, the reaction would have stopped. the activation energy was reached at 11: 15 a.m. the previous change was the threshold point for a reaction. the activation energy was reached at 10: 15 a.m. the additional energy allowed for a lower activity level. the activation energy was reached was 10: 45 a.m. the additional energy did not affect the reaction.

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Biology, 01.08.2019 12:30, oof5221

Activation energy is only required to start an exothermic reaction. a. true b. false

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Chemistry, 08.08.2019 06:20, hit89

consider the combustion of methane in oxygen (a reaction we've seen when we've lit soap bubbles on fire), which is a highly exothermic reaction.: true or false 1. once the activation energy has been reached increasing the concentration of methane and oxygen will increase the rate of the reaction. 2. a successful collision (one that leads to the combustion of methane) will will not need to meet the activation energy due to the extreme exothermic nature of the reaction. 3. once the activation energy has been reached, increasing the temperature will have no effect on the rate of the reaction. 4. a mixture of methane and oxygen can be kept in the same container indefinitely at room temperature with no change because the collisions taking place between the molecules do not have enough energy to reach overcome the reaction barrier.

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Chemistry, 16.10.2019 04:30, Christyhanes3764

Me i beg you i really need endothermic and exothermic reactions are terms describing reactions that absorb thermal energy. true false the amount of energy required to raise the temperature of a swimming pool depends on the mass of water present. true false you have been given two different amounts of the same substance. if given double the amount of moles of one, the amount of heat to vaporize the substance will be halved. true false according to the second law of thermodynamics, energy of the universe must always increase. true false when an object releases thermal energy, the average kinetic energy of the object's molecules increases. true false the gibb's free energy equation shows that it is not enough for the change in enthalpy to be negative for a reaction to be spontaneous. true false according to collision theory, the greater number of effective collisions that occur between reactant particles per second, the greater the rate of reaction. true false in an energy diagram for an exothermic chemical reaction, the total energy change is the difference in energy between the energy of the reactants and the energy of the products. true false an increase in temperature for a reaction with a + δh will shift the equilibrium toward the products. true false in calculating the equilibrium constant for a reaction, the coefficients of the chemical equation are used as exponents for the factors in the equilibrium expression. true false

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