Why do most reactions increase in rate as the temperature rises?
Why do most reactions increase in rate as the temperature rises?
Homework Answers
When the temperature of any system increases , it increases the average kinetic energy of each of the components. As the kinetic energy increases , it causes the components to move faster & collide into each other in a given time. It results in the components having a greater force on each collision. This increase in activity & energy increase the reaction rate . That is why most reactions increase in rate as the temperature rises.
2. Why do some reactions that are not spontaneous at room temperature become spontaneous at higher...
2. Why do some reactions that are not spontaneous at room temperature become spontaneous at higher temperatures? Explain your reasoning using appropriate mathematical equations
(f) [2 point) At an altitude of 50 km the temperature of the atmosphere rises to...
(f) [2 point) At an altitude of 50 km the temperature of the atmosphere rises to 280 K. By what factor does the rate constant increase at this temperature? Assume the prefactor A does not change. ntel The rate law for the reaction Cl2(g) + H2(g) → 2 HCl(g) is determined to be first order i
It is often noted that a ten degree increase in temperature roughly doubles the rate of...
It is often noted that a ten degree increase in temperature roughly doubles the rate of reaction of many chemical reactions. If it takes 20 seconds at 40 degrees celsius, how long would it take at 60 degrees celsius?
1. Hot air rises - this causes upward heat transfer and is one of the most...
1. Hot air rises - this causes upward heat transfer and is one of the most familiar forms of convection. Why does air cool as it rises this way? 2. (H16.17) Since all objects emit energy to their surroundings, why don’t the temperatures of all objects continuously decrease? 3. (H16.25) Does Newton’s law of cooling apply to warming a well as to cooling? 4. (H17.4) Why is evaporation a cooling process? 5. (H17.19) When will water boil at a temperature...
if the rate constant for a reaction tripled when the temperature rises from 3.00×10^2 k to...
if the rate constant for a reaction tripled when the temperature rises from 3.00×10^2 k to 3.10 ×10^2 k.what is the activation energy of the reaction?
just circle the answer Why do you think polar aprotic solvents increase the rate of an...
just circle the answer
Why do you think polar aprotic solvents increase the rate of an SN2 reaction? a) Polar solvents dissolve the substrates most effectively, speeding up the reaction b) Aprotic solvents better solvate the leaving group and therefore accelerate the reaction c) Aprotic solvents solvate the nucleophile less, 'naked' nucleophiles are more reactive d) Aprotic solvents raise the enegy of the reagents and therefore accelerate the reaction
The growth of a plant is a series of chemical reactions. Are these reactions temperature dependent?...
The growth of a plant is a series of chemical reactions. Are these reactions temperature dependent? Design an experiment to test this factor. Why does growth rate decrease above certain temperatures?
b. 7. Why does it take more heat to increase the temperature of diatomie gas vs. monoatomic gas (why the heat capac...
b. 7. Why does it take more heat to increase the temperature of diatomie gas vs. monoatomic gas (why the heat capacity of diatomic gasses are larger)? Choose the most correct statement: Monoatomic gas Diatomic gas a. Diatomic gasses are always heavier than monoatomic gasses, so it takes more energy to increase its temperature. b. Diatomic gasses have rotational motion that monoatomic gasses do not have. More energy is needed to make the diatomic gasses to spin faster. . The...
7. An increase in the temperature of the reactants causes an increase in the rate of...
7. An increase in the temperature of the reactants causes an increase in the rate of reaction. The best explanation for this behavior is that as the temperature increases, a. the fraction of collisions with total kinetic energy greater than Ea increases. b. the concentration of reactants increases. c. the activation energy remains the same. d. the collision frequency decrease
1. Draw a graph of growth rate vs temperature for a mesophile. 2. Why do halophiles...
1. Draw a graph of growth rate vs temperature for a mesophile. 2. Why do halophiles produce compatible solutes?
2. Why do some reactions that are not spontaneous at room temperature become spontaneous at higher temperatures? Explain your reasoning using appropriate mathematical equations
(f) [2 point) At an altitude of 50 km the temperature of the atmosphere rises to 280 K. By what factor does the rate constant increase at this temperature? Assume the prefactor A does not change. ntel The rate law for the reaction Cl2(g) + H2(g) → 2 HCl(g) is determined to be first order i
just circle the answer
Why do you think polar aprotic solvents increase the rate of an SN2 reaction? a) Polar solvents dissolve the substrates most effectively, speeding up the reaction b) Aprotic solvents better solvate the leaving group and therefore accelerate the reaction c) Aprotic solvents solvate the nucleophile less, 'naked' nucleophiles are more reactive d) Aprotic solvents raise the enegy of the reagents and therefore accelerate the reaction
b. 7. Why does it take more heat to increase the temperature of diatomie gas vs. monoatomic gas (why the heat capacity of diatomic gasses are larger)? Choose the most correct statement: Monoatomic gas Diatomic gas a. Diatomic gasses are always heavier than monoatomic gasses, so it takes more energy to increase its temperature. b. Diatomic gasses have rotational motion that monoatomic gasses do not have. More energy is needed to make the diatomic gasses to spin faster. . The...
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