1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Fudgin [204]
4 years ago
9

The rate constants of some reactions double with every 10-degree rise in temperature. Assume that a reaction takes place at 295

K and 305 K. What must the activation energy be for the rate constant to double as described?
Chemistry
1 answer:
LUCKY_DIMON [66]4 years ago
8 0

Answer : The activation energy for the reaction is, 51.9 kJ

Explanation :

According to the Arrhenius equation,

K=A\times e^{\frac{-Ea}{RT}}

or,

\log (\frac{K_2}{K_1})=\frac{Ea}{2.303\times R}[\frac{1}{T_1}-\frac{1}{T_2}]

where,

K_1 = rate constant at 295 K

K_2 = rate constant at 305 K = 2K_1

Ea = activation energy for the reaction = ?

R = gas constant = 8.314 J/mole.K

T_1 = initial temperature = 295 K

T_2 = final temperature = 305 K

Now put all the given values in this formula, we get:

\log (\frac{2K_1}{K_1})=\frac{Ea}{2.303\times 8.314J/mole.K}[\frac{1}{295K}-\frac{1}{305K}]

Ea=51879.96J=51.9kJ

Therefore, the activation energy for the reaction is, 51.9 kJ

You might be interested in
¿Cómo a teoría del enlace de valencia se puede predecir la estructura del agua y del metano?
Paraphin [41]

Answer:

i dont know

Explanation:

i cant speak spanish lol

5 0
3 years ago
The energy needed to remove an electron from an atom is called
Arlecino [84]

Ionization energy, also called ionization potential, in chemistry, the amount of energy required to remove an electron from an isolated atom or molecule

3 0
3 years ago
Which of these electron transitions correspond to absorption of energy and which to emission?
Elan Coil [88]

Answer:

n = 5 to n = 6 absorption

n = 9 to n = 6 emission

n = 6 to n = 4 emission

n = 6 to n = 7 absorption

Explanation:

According to the Bohr's model of the atom. An electron in an atom may absorb energy and move from a lower energy level to a higher energy level. This requires absorption of energy that is equal to the energy difference between the two levels.

Similarly, an electron may move from a higher to a lower energy level, releasing energy that is equal to the energy difference between the higher and the lower level. This is known as emission.

Hence, if the electron is moving from a lower energy level to a higher energy level, an absorption has taken place, e.g n = 5 to n = 6

When an electron moves from a higher energy level to a lower energy level, an emission has taken place e.g n = 9 to n = 6

5 0
3 years ago
Describe the freedom of movement of particles as a substance changes states of matter from solid to liquid to gas.
Vsevolod [243]

Answer:

in a sold the particles are in a fixed position and can only vibrate on the spot but when it changes into a liquid the energy is used to weaken the bonds so there are weak forces of attraction between the particles, all particles are still touching each other but are now free to move around. Ina gas all the bonds are broken, the gas particles are free to move around anywhere and the more collisions there are, the more the pressure increases

4 0
3 years ago
Food travels directly from the stomach to the
OleMash [197]
From the stomach, the food travels to the small intestine. This happens with the help of a movement known as peristalsis. Juices are released in the small intestine, which helps in the breakdown of carbohydrates, starch, and proteins. 
3 0
3 years ago
Other questions:
  • Which of the following represents six molecules of water? 6HO 2 6H 2O 1 6H 2O H 6O
    10·2 answers
  • What is a niche of a greenfly?
    7·1 answer
  • What is the difference between effusion and diffusion?
    14·1 answer
  • determine the molecular formula of the compound with an empirical formula of CH and a molar mass of 78.110g/mol
    12·1 answer
  • Can someone please help me??? Please!!!???
    14·1 answer
  • 1. In the reaction C5H8 + ______ O2 --> 8H2O + 5CO2, what coefficient should be placed in front of O2 to balance the reaction
    15·2 answers
  • What is the chemical formula for calcium hydroxide
    11·2 answers
  • Why don't solids change shape?
    14·1 answer
  • A student labeled 5 tubes 0, 1, 2, 3, 4, 5. Tube 0 contained undiluted protein lysate. The student used the tube 0 lysate to pre
    7·1 answer
  • Hypothesize How much do you think an apple weighs?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!