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Activation Energy
Page 2
Questions (107)
The standard free energy of activation of a reaction A is 88.6 kJ mol–1 (21.2 kcal mol–1) at 298 K. Reaction B is one
2 answers
asked by
Anonymous
1,266 views
For a particular chemical reaction, the rate constant at 30.0 °C is 1.38 X 10-4 L mol-1 s-1, while the value at 49.0 °C is
2 answers
asked by
bob
1,116 views
What is activation energy, and how does a catalyst affect it?
4 answers
asked by
hh
16 views
The activation energy of a certain reaction is 65.7 kJ/mol. How many times faster will the reaction occur at 51°C than at 8°C?
2 answers
asked by
Hannah
1,119 views
An activation energy of 2.0 eV is required to form a vacancy in a metal. At 800¡èC there is one vacancy for every 10^-4 atoms.
1 answer
asked by
ali
1,031 views
I have two questions that I really don't understand.
The first one is: A reaction proceeds with delta H=-10kJ/mol. The energy of
5 answers
asked by
kathryn
1,131 views
Methane gas reacts with diatomic sulfur in the gas phase, producing carbon disulphide and hydrogen sulfide. The rate constant
2 answers
asked by
MK
895 views
True or false
1. The energy of a collision between atoms or molecules must be greater than the activation energy for bonds to be
3 answers
asked by
Josh
892 views
A first order reaction has an activation enery of 50.0kJ/mol. When a catalyst is added the activation energy of the catalyzed
2 answers
asked by
Darcy
885 views
what is the equation for activation energy in terms of chemical kinetics. i tried to look it up but i get something different
2 answers
asked by
Gabe
840 views
The energy necessary to start a chemical reaction is called the _______ energy.
a)exothermic b)activation c)endothermic
2 answers
asked by
Thelma
822 views
1)
The activation energy of a certain reaction is 35.3 kJ/mol. At 20 degrees C, the rate constant is 0.0130 s^-1. At what
4 answers
asked by
Evets
1,018 views
consider the following reactions
O+N2->NO+N Ea=315kj/mol Cl+H2->HCl+H Ea=23kj/mol Why is the activation energy for one much lower
2 answers
asked by
help
762 views
The activation energy of a reaction is typically determined by calculating the rate constant for the reaction at two
2 answers
asked by
danny
741 views
The activation energy for the decomposition reaction,
2 HI---> H2 + Hi Is 186 kj/mol. The rate at 555 k is 3.2 x 10 -7L/mol. Sec.
2 answers
asked by
court
737 views
The reaction rate triples when the temperature increases from 15 to 35 degree C. What is the activation energy?
3 answers
asked by
Darcy
708 views
If a temperature increase from 19.0 degrees C to 36.0 degrees C triples the rate constant for a reaction, what is the value of
2 answers
asked by
kristen
713 views
The activation energy for a particular reaction is Ea = 14.80 kJ. What percentage of the molecules are at or above the
1 answer
asked by
Tsomo
696 views
A certain reaction has an activation energy of 74.38 kJ/mol. At what Kelvin temperature will the reaction proceed 7.00 times
2 answers
asked by
HELP PLEASE
680 views
For the elementary process below, the activation energy is 31 kJ mol−1 and the enthalpy of reaction is 12 kJ mol−1. What is
2 answers
asked by
layla
657 views
For the decomposition of dinitrogen oxide, the rate constant is 0.043 L/mol-min at 665 oC and 12.5 L/mol-min at 828 oC. What is
3 answers
asked by
Saoirse
634 views
The standard free energy of activation of a reaction A is 78.2 kJ mol–1 (18.7 kcal mol–1) at 298 K. Reaction B is ten
3 answers
asked by
Deidra
634 views
an endothermic reaction a to b has an activation energy of 15 kcal per mol and heat of reaction 5 kcal per mol the activation
2 answers
asked by
Anonymous
591 views
Consider a one step reaction. Which of the following does not describe the activation energy of the process?
The minimum amount
1 answer
asked by
Sarah
595 views
What is activation energy?(1 point)
A.) the energy released when atomic bonds are broken B.) the energy that must be added to a
3 answers
asked by
AppleBottomJeans
611 views
For the elementary process below, the activation energy is 31 kJ mol−1 and the enthalpy of reaction is 12 kJ mol−1. What is
2 answers
asked by
dave
538 views
The standard free energy of activation of one reaction is 94.3 kj/mol^-1 (22.54 kcal/mol^-1). The standard free energy of
2 answers
asked by
Tokey
554 views
Activation energy is____
the heat released in a reaction*** the energy barrier between reactants and products the energy given
2 answers
asked by
Annamarie
543 views
3. Which of the following conditions would likely cause the activation energy to be high?
A.atoms are close together B.the
4 answers
asked by
Cassie
510 views
Consider a one step reaction. Which of the following does not describe the activation energy of the process?
The minimum amount
2 answers
asked by
Gerrard
514 views
A reaction rate increases by 60.3% when the temperature is increased from 21.5 to 35.6°C. Calculate the activation energy (in
2 answers
asked by
matt
512 views
The rate constant,K, for a given was determined at a number of temperatures. A graph of log K versus the reciprocal of the
2 answers
asked by
temmick
496 views
It was mentioned that the rates of many reactions approximately double for each 10 °C rise in temperature. Assuming a starting
2 answers
asked by
Pavleen II
492 views
A certain reaction has an activation energy of 58.80 kJ/mol. At what Kelvin temperature will the reaction proceed 6.50 times
2 answers
asked by
Sam
489 views
Are all of these examples of activation energy? If not which ones aren't.
1.To go forward on your bicycle, you must paddle. 2. A
1 answer
asked by
Ayeisha
481 views
A certain reaction has an activation energy of 74.38 kJ/mol. At what Kelvin temperature will the reaction proceed 7.00 times
2 answers
asked by
HELP PLEASE
478 views
Consider a one step reaction. Which of the following does not describe the activation energy of the process?
The minimum amount
1 answer
asked by
John
469 views
A first order chemical reaction has a rate constant of 8.7×103 s-1 at 30 °C and a rate constant of 5.8×104 s-1 at 64 °C.
Calc
1 answer
asked by
Anonymous
469 views
A certain reaction has an activation energy of 25.14 kJ/mol. At what Kelvin temperature will the reaction proceed 8.00 times
1 answer
asked by
Tsomo
451 views
Can the activation energy for an endothermic reaction be heat or acid?
I know that heat is a main exothermic activation energy,
1 answer
asked by
Anonymous
436 views
A first-order reaction has rate constants of 4.6 x 10^-2 inverse seconds and 8.1 x 10^-2 inverse seconds at 0 degrees C and 20
1 answer
asked by
Jim
444 views
calculate the rate of a constant reaction at 293 kelvin when the energy of activation is 103 kilo joules per mole and the rate
1 answer
asked by
Emeldah
437 views
can u pls identify which has the greater activation energy. A cube of Fe reacting with 20mL, 1.0mol/L HCl or powdered Fe, having
1 answer
asked by
loulou
445 views
A pile of firewood is more stable as ash and smoke than firewood.
Why does this pile of firewood not immediately release the
1 answer
asked anonymously
23 views
The activation energy needed for a chemical reaction is decreased by the presence of a
____________________. A catalyst B
1 answer
asked anonymously
22 views
The energy that must be added to a system to break the bonds of the reactants is known as the __________ _______.
a activation
1 answer
asked anonymously
22 views
Which phrase best describes activation energy?(1 point) Responses the energy required to rearrange and switch individual
1 answer
asked anonymously
15 views
What is activation energy?(1 point)
Responses the kinetic energy of the reactants of a system after the reaction has begun the
1 answer
asked anonymously
52 views
Activation energy can be required for both endothermic and exothermic reactions true or false
1 answer
asked anonymously
16 views
Activation energy can be required for both endothermic and exothermic reactions.
* 1 point true false
1 answer
asked anonymously
14 views
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Parent Categories (16)
Cellular Respiration and Photosynthesis
Chemical Kinetics
Chemical Reactions
Chemistry
Endothermic and Exothermic Reactions
Energy Conversion
Energy in Chemical Reactions
Enzymes
Kinetics
Reaction kinetics
Reaction Mechanisms
Reaction rates
Reactions
Reactions and Mechanisms
Thermodynamics
Types of energy