For each of the following gas-phase reactions, write the rate expression in terms of the appearance of each product and disappearance of each reactant: a. Os(g) + H2O(g) → 2 O2(g) + H2(g) b. 4 NH3(g) + 5 O:(g) → 4 NO(g) + 6 H;O(g) c. 2 C2H2(g) + 5 O2(g) → 4 CO2(g) + 2 H:O(g) d. CaH;NH2(g) – CaHe(g) + NH3(g)
For each of the following gas-phase reactions, write the rate expression in terms of the appearance of each product and disappearance of each reactant: a. Os(g) + H2O(g) → 2 O2(g) + H2(g) b. 4 NH3(g) + 5 O:(g) → 4 NO(g) + 6 H;O(g) c. 2 C2H2(g) + 5 O2(g) → 4 CO2(g) + 2 H:O(g) d. CaH;NH2(g) – CaHe(g) + NH3(g)
Chemical Principles in the Laboratory
11th Edition
ISBN:9781305264434
Author:Emil Slowinski, Wayne C. Wolsey, Robert Rossi
Publisher:Emil Slowinski, Wayne C. Wolsey, Robert Rossi
Chapter21: Rates Of Chemical Reactions, Ii. A Clock Reaction
Section: Chapter Questions
Problem 2ASA
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The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
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When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
Question
How to solve number 2 a to d.
Transcribed Image Text:LEARNING ACTIVITY 2
1. Consider the following hypothetical aqueous reaction:
A(aq) – B(aq)
A flask is charged with 0.200 mol of A in a total volume of 100.0 mL. The following data are collected:
Time (min)
Moles of A
20
0.140
40
0.100
60
0.070
80
0.050
0.200
a. Calculate the number of moles of B at each time in the table, assuming that there are no molecules
of B at time zero and that A cleanly converts to B with no intermediates.
b. Calculate the average rate of disappearance of A for each 20-min interval in units of M/s.
c. Calculate the average rate of disappearance of A from the start of reaction to t = 80 min in units of
M/s.
d. Between t = 0 min and t = 60 min, what is the average rate of appearance of B in units of M/s?
Assume that the volume of the solution is constant.
2. For each of the following gas-phase reactions, write the rate expression in terms of the appearance of
each product and disappearance of each reactant:
a. Os(g) + H2O(g) → 2 O2(g) + Hz(g)
b. 4 NH3(g) + 5 Oz(g) → 4 NO(g) + 6 H;O(g)
c. 2 C2H2(g) + 5 O2(g) → 4 CO2(g) + 2 H2O(g)
d. CaH;NH2(g) –→ CaHe(g) + NH3(g)
3. Consider the reaction Os(g) + H2O(g) → 2 Oz(g) + H2(g). If the concentration of Os is decreasing at the
rate of 0.025 M/s, what are the rates of change in the concentrations of Oz and H2?
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