Chemistry Problems

High school
Scholarship Essay
Miscellaneous
Pages 5 (1255 words)
Download 0
2. At an increased temperature, the molecules gain energy and therefore their speed is increased. This results in the increment in the number of collisions and hence the rate of reaction. Increasing the temperature also increases the kinetic energy of the reactants but the activation energy remains constant.

Introduction

As the activation energy decreases the rate of reaction increases. So the rate of the reaction would be fastest for the reaction with minimum activation energy (Ea = 10 kJ/mole).
19. From the data it can be seen that as the concentration of Br2 is doubled keeping the concentration of NO constant, the rate of reaction is doubled. This means that the reaction is first order with respect to Br2.
20. From the data it can be seen that as the concentration of reactant A is increased to 4 times, keeping the concentration of B and C constant, the rate of the reaction increases by 4 times. This means that the reaction is first order with respect to A.
Similarly when the concentration of reactant A is increased to twice the value and that of reactant B is also increased to twice the value, keeping the concentration of reactant C constant, the rate of reaction increases to twice the value. As this increment is attributed to reactant A therefore the order of the reaction with respect to B is zero.
2. According to the Le Chatlier's principle, for a exothermic reaction if the temperature of the reaction is increased the value of the equilibrium constant decreases. As the equilibrium constant decreases the concentration of products is lowered.
...
Download paper
Not exactly what you need?

Related papers

Chemistry.
Some toxins, such as mercury, persist in the environment and accumulate. Humans or animals often absorb them when they eat fish.…
chemistry chemistry
(Frederick, 1979, P.67) Intramolecular forces are much stronger than intermolecular forces hence the generally higher Melting and Boiling points associated with substances that have intramolecular forces. Aluminium, being a metal would be expected to form an ionic bond with Chlorine, which is a gaseous non-metal. This is not the case however due to the very small size of the Aluminium atom, which…
chemistry
Aluminium is metal with atomic number 13 and it will combine by loosing two electrons. Beryllium and aluminium are metals and will combine with other elements by loosing electrons while oxygen will combine by gaining electrons, therefore our empirical formula will have the following formula:…
Chemistry Essay
The device is essentially composed of a 'light sponge' of nanoparticles. The dye-sensitized property means that the titanium has a monolayer of absorbed dye which increases the likelihood of photon capture (Tulloch, 2004).…
Medicine. Chemistry
The hits come from natural sources, such as plants, animals, or fungi. They can also form synthetic sources, such as historical compound collections and combinatorial chemistry.…
Chemistry Experiments
This methodology is widely use to determine concentration of various metal ion like Cu, Al, sulphide etc. being highly sensitive and accurate methods precautions should be taken while performing estimations. some of them are as follows.…
Chemistry Problems
As the activation energy decreases the rate of reaction increases. So the rate of the reaction would be fastest for the reaction with minimum activation energy (Ea = 10 kJ/mole).…