Consider the reaction:
Suppose that at a particular moment during the reaction molecular hydrogen is reacting at the rate of
Interpretation:
The rate at which ammonia reacts and at which nitrogen reacts with given rate of reaction of molecular hydrogen is to be calculated.
Concept introduction:
The branch of chemistry thatdeals with the relative rates of the chemical reactions and the factors affecting the rates of reactions is known as chemical kinetics.
The rate of reaction is the measurement of concentration change of reactants within a period of time.
For the reaction:
If three moles of B are reacted then its rate expression will be divided by 3and if two moles of C are formed then its rate expression will be divided by 2
The rate expression of reactant has negative sign because they are consumed in reaction.
The rate expression of product has positive sign because they are formed in reaction.
Rate is always a positive quantity, the concentration of reactant decreases, a minus sign is required in rate expression to make it positive.
The rate expression for the reaction is given by:
Answer to Problem 8QP
Solution: (a)
(b)
Explanation of Solution
a) Rate of formation of ammonia
The given reaction is as follows:
Molecular hydrogen reacts at the rate of
The rate expression for the reaction is given as follows:
The rate at which ammonia is formed is calculated by the expression as follows:
Substitute the value of rate at which molecular hydrogen reacts in the above equation.
The rate at which ammonia is formed is
Given information:
The given reaction is as follows:
Molecular hydrogen reacts at the rate of
b) The rate at molecular nitrogen reacts.
The rate expression for the reaction is given as follows:
The rate at whichnitrogen reacts is calculated by the expression as follows:
Substitute the value of rate at which molecular hydrogen reacts in the above equation,
The molecular nitrogen reacts at the rate of
Want to see more full solutions like this?
Chapter 14 Solutions
Package: Chemistry With Aleks 360 Access Card, 2-semester
- Express the rate of the reaction 2N2O(g)2N2(g)+O2(g) in terms of (b) [ N2O ] (a) [ O2 ]arrow_forwardThe reaction for the Haber process, the industrial production of ammonia, is N2(g)+3H2(g)2NH3(g) Assume that under certain laboratory conditions ammonia is produced at the rate of 6.29 ×10-5 molL-1s-1. At what rate is nitrogen consumed? At what rate is hydrogen consumed?arrow_forwardAt 573 K, gaseous NO2(g) decomposes, forming NO(g) and O2(g). If a vessel containing NO2(g) has an initial concentration of 1.9 102 mol/L, how long will it take for 75% of the NO2(g) to decompose? The decomposition of NO2(g) is second-order in the reactant and the rate constant for this reaction, at 573 K, is 1.1 L/mol s.arrow_forward
- For the reaction 4NO2(g)+O2(g)2N2O5(g) (a) express the rate of formation of N2O5 in terms of the rate of disappearance of O2. (b) suppose the rate of disappearance of O2 is 0.0037 mol L1 s1. Calculate the rate of disappearance of NO2.arrow_forwardOne possible mechanism for the decomposition of nitryl chloride, NO2CI, is What is the overall reaction? What rate law would be derived from this mechanism? What effect does increasing the concentration of the product NO2 have on the reaction rate?arrow_forwardFor a reaction involving the decomposition of Z at a certain temperature, the following data are obtained: (a) What is the order of the reaction? (b) Write the rate expression for the decomposition of Z. (c) Calculate k for the decomposition at that temperature.arrow_forward
- Diethylhydrazine reacts with iodine according to the following equation: Â (C2H5)2(NH)2(l)+I2(aq)(C2H5)2N2+2HI(aq)The rate of the reaction is followed by monitoring the disappearance of the purple color due to iodine. The following data are obtained at a certain temperature. (a) What is the order of the reaction with respect to diethylhydrazine, iodine, and overall? (b) Write the rate expression of the reaction. (c) Calculate k for the reaction. (d) What must [(C2H5)2] be so that the rate of the reaction is 5.00104mol/Lh when [ I2 ]=0.500M?arrow_forwardSucrose, a sugar, decomposes in acid solution to give glucose and fructose. The reaction is first-order in sucrose, and the rate constant at 25 C is k = 0.21 h1. If the initial concentration of sucrose is 0.010 mol/L, what is its concentration after 5.0 h?arrow_forwardWrite a rate law for NO3(g) + O2(g) NO2(g) + O3(g) if measurements show the reaction is first order in nitrogen trioxide and second order in oxygen.arrow_forward
- Chemistry & Chemical ReactivityChemistryISBN:9781133949640Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningChemistry & Chemical ReactivityChemistryISBN:9781337399074Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningChemistry: Principles and PracticeChemistryISBN:9780534420123Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward MercerPublisher:Cengage Learning
- Chemistry for Engineering StudentsChemistryISBN:9781285199023Author:Lawrence S. Brown, Tom HolmePublisher:Cengage LearningChemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage LearningChemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage Learning