Question

Which of the following statement is not true. a. an endothermic reaction has an early transition...

Which of the following statement is not true.

a. an endothermic reaction has an early transition state.

b. the transition state of an exothermic reaction resembles reactants.

c. the activation energy of the forward reaction of an exothermic reaction is less than the activation energy of its reverse reaction.

d. an endothermic reaction requires energy to proceed in the forward direction.

Science   Chemistry   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

The statement that is not true is (a).

Endothermic reactions are those reactions which absorbs energy. In such reactions the reactants have lesser energy than the products and energy is needed for the reaction to go forward. So, it takes time to form the transition state. As a result, such reactions does not form transition state early. Therefore, statement a is not true and statement d is true. On the other hand, exothermic reactions are those reactions which releases energy. In such reactions the energy of the products are less than that of the reactanst. They form transition states resembled to the reactants early. Hence, statement c and b are true. Thus, statements (b), (c) and (d) are true and statement (a) is not true.

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
1. In an endothermic reaction the products are.... A. None of the above. B.At the same...
1. In an endothermic reaction the products are.... A. None of the above. B.At the same energy as the reactants. C. At a higher energy than the reactants. D. At a lower energy than the reactants. 2. The rate determining step for a reaction is characterized by... A. None of the above. B. A high activation energy C. Transition state resembling the reactants. D. An intermediate at a lower energy than the reactant. 3. When is a reaction exothermic? A....
Which if the following statements is incorrect? A. Reaction with higher activation energy has higher rate...
Which if the following statements is incorrect? A. Reaction with higher activation energy has higher rate constant B. The catalyst does not affect the equilibrium of a reaction C. Half-life period of a first order reaction is independent of the final concentration D. In an endothermic reaction, the activation energy of the reverse reaction is lower than that of the forward reaction.
Which of the following statements is a true statement concerning a reaction that has reached a...
Which of the following statements is a true statement concerning a reaction that has reached a state of equilibrium? A system has reached equilibrium when there are equal amounts of products and reactants present in the system. A system has reached equilibrium when the rate constant for the forward reaction equals the rate constant of the reverse reaction. A system has reached equilibrium when the reaction has stopped and no more products are formed. A system has reached equilibrium when...
Which statement is NOT true about transition state? a. It has higher free energy than the...
Which statement is NOT true about transition state? a. It has higher free energy than the substrate b. It fits enzyme active site better (with higher affinity) than the substrate c. It helps stabilize tertiary structure of an enzyme d. It exists for a very short time during the reaction
Which statement(s) is/are true regarding the emission of a photon from a hydrogen atom? a. The...
Which statement(s) is/are true regarding the emission of a photon from a hydrogen atom? a. The emission of photons is an endothermic process, so ∆E is positive. b. The emission of photons is an exothermic process, so ∆E is negative. c. The wavelength of the ni = 3 to nf = 2 transition is shorter than the ni = 4 to nf = 2 transition. d. The energy of the ni = 3 to nf = 2 transition is greater...
A reaction will tend to go in the forward direction when which of the following conditions...
A reaction will tend to go in the forward direction when which of the following conditions is met? _______ (a) the ΔG of the forward reaction is less than 0 (b) the ΔG of the forward reaction is greater than 0 (c) the ΔG of the forward reaction is equal to 0 (d) the ΔG of the reverse reaction is less than 0 (e) the ΔG of the reverse reaction is equal to 0
a.)A certain reaction has an activation energy of 25.10 kJ/mol. At what Kelvin temperature will the...
a.)A certain reaction has an activation energy of 25.10 kJ/mol. At what Kelvin temperature will the reaction proceed 7.00 times faster than it did at 289 K? b.A certain reaction has an enthalpy of ΔH = 39 kJ and an activation energy of Ea = 51 kJ. What is the activation energy of the reverse reaction? c.)At a given temperature, the elementary reaction A<=> B in the forward direction is the first order in A with a rate constant of...
What effects are produced by an enzyme on the general reaction? a) The formation of the...
What effects are produced by an enzyme on the general reaction? a) The formation of the transition state is promoted. b) The concentration of the products is increased. c) Δ? for the reaction decreases. d) The activation energy for the reaction is lowered. e) The rate constant for the forward reaction (?1) increases. f) The reaction equilibrium is shifted toward the reactants.
If the reaction is exothermic in the forward direction, which one of the following happens when...
If the reaction is exothermic in the forward direction, which one of the following happens when reaction vessel is placed in a boiling water bath?  Circle one of the choices. The green color turns more intense. The green color turns less intense. No change in color intensity. Explain briefly your choice below (give reason): Q2. Examine your observations in part (F) of the experiment and determine whether the following reversible reaction is exothermic or endothermic in the forward direction.  Give...
Which is a property of a reaction that has reached equilibrium? [1] The amount of products...
Which is a property of a reaction that has reached equilibrium? [1] The amount of products is greater than the amount of reactants. [2] The amount of products is equal to the amount of reactants. [3] The rate of the forward reaction is greater than the rate of the reverse reaction. [4] The rate of the forward reaction is equal to the rate of the reverse reaction. [5] None of the above.
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT