# Chemistry - enthalpy and rate constant (check)

22. The rate of a chemical reaction is dependent on its ΔH. Do you agree or disagree with this statement? Briefly justify your answer.
I agree with the above statement, enthalpy is defined as the internal energy of the reactants and products therefore the chemical reaction will depend on the breaking and forming of the bonds which will then be either exothermic or endothermic.
23. What is the relationship between the units of the rate constant, k, and the overall reaction order?
The relationship between the units of the rate constant, k, and the overall reaction order is that it will determine the unit of k.

i am unsure of the above answer for the two question, can somebody please help me verify if they are correct

1. 👍 0
2. 👎 0
3. 👁 252
1. I don't agree with 22. DH is one factor that determines the spontaneity of the reaction (DG = DH -TDS) but it doesn't tell you anything about the rate. For example, the stable form of carbon is graphite. So diamonds will spontaneously degrade to graphite.(C graphite has DH = 0; C diamond has DH = 1.9 kJ/mol) However, the reaction is so slow that diamonds can be bought and sold as jewelry with no fear of them degrading significantly over many decades.
I don't agree with your answer to 23 either. Forgive me for being so direct but your answer appears to me that you don't know the answer so you put in a lot of words, talked around the answer and about the answer, but you never answered the question. If you really do know what you are talking about then I think the answer should be modified to a direct answer. If I wanted to answer this question I would look at the units for a first order reaction (easy enough to figure out), then look at a reaction that is first order with two reactants (and second order overall) and note the relationship, if any.

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Chemistry

At a given temperature, a first-order reaction has a rate constant of 3.5 ´ 10–3 s–1. How long will it take for the reaction to be 24% complete? A chemical reaction that is first-order in X is observed to have a rate constant

asked by Juli on November 17, 2014
2. ### Chemistry

What change do you expect if the value of the reaction quotient is greater than the value of the equilibrium constant? A- Rate of the forward reaction is greater than the rate of the reaction B- The rate of the forward reaction is

asked by Ben on July 27, 2020
3. ### Chemistry

The overall rate of any chemical reaction is most closely related to a) the number of steps in the reaction mechanism b)the overall reaction c) the fastest step in the reaction mechanism d)the slowest step in the reaction

asked by Bobby on July 21, 2010
4. ### Chemistry

1. For the reaction 2N2O(g) ⇋ O2(g) + 2N2(g), what happens to the equilibrium position if the pressure decreases? A. Shift to the right B. Shift to the left C. Doubles D. Does nothing E. Halves 2. if an equilibrium reaction

asked by josh on October 16, 2012
5. ### chemistry

What is the difference between biochemical, pharmaceutical, and diagnostic chemical reactions in healthcare? What is a specific example that exists for each of these chemical reaction types above and why might it be of importance

asked by slomomo on May 16, 2014
1. ### chemistry

a) Describe how to determine if a reaction will be thermodynamically favorable. b) Describe what happens to the Gibbs Free Energy term when a chemical reaction is reversed. c) Describe how coupling reactions are used to drive an

asked by Morgan on March 12, 2015
2. ### calculus 1-chemistry

The relationship between the rate of a certain chemical reaction and temperature under certain circumstances is given byR(T)=0.1(−0.05T^3+4T^2+120)grams/sec, where Ris the rate of reaction and Tis the temperature (in °C).

asked by john on December 21, 2017
3. ### chemistry

Examine the scenario. Chemical Reaction A and Chemical Reaction B involve the same two reactants. Chemical Reaction A is performed in a hot container, while Chemical Reaction B is performed in a cold container. Which of the answer

4. ### Calculus

A chemical reaction proceeds in such a way that after the first second, the amount of a certain chemical involved in the reaction changes at a rate that’s inversely proportional to the product of the mass of the chemical present

asked by Sarah on October 10, 2019
5. ### Chemistry 2

An industrial chemical reaction has a rate law: rate = k [C]. The activation energy for the reaction is 3.0000 x 10^4 J/mol and A = 2.000 x 10^-3. What must be the reaction temperature if a rate of 1.000 x 10^-9 M/s is required

asked by Jessica on March 12, 2012
6. ### chemistry

Which statement describes a chemical reaction at equilibrium? A. The forward reaction happens slightly faster than the reverse reaction. B. The reaction has stopped because all reactants have been used up. C. The forward reaction

asked by emma on September 10, 2016