what do 35.5 g of chlorine and 12.011 g of carbon have in common? Interpret the
ID: 851428 • Letter: W
Question
what do 35.5 g of chlorine and 12.011 g of carbon have in common?
Interpret the following equation for the complete combustion of octane in terms of moles of reactants and products, and their molar masses:
2c8H18 (l) + 25 O2 (g)-------- 16 CO2 (g) + 18 H2O (l)
What is the effect of a catalyst on the activation energy of a chemical reaction?
Describe how each of the following changes will affect the rate of a reaction
a. increase in temperature
b. increase in concentration
c. introduction of a catalyst
what is the general name for biological catalysts
what is meant by the term dynamic equilibrium
what is meant when it is said that the reaction shifts in favor of the reactants
Does entropy increase or decrease in the folloiwng reaction'
Nitrogen reacting with oxygen to form nitrogen dioxide
give definitions for the following terms
a. anode
b. primary battery
c. secondary battery
d. cathode
Which is more highly oxidized, a potassium atom or a K+ ion
Why can earths atmosphere be describe as an oxidizing atompshere
Tell which substance is reduced and which is oxidized in teh following equations. Label the oxidizing agent and reducing agent in each equation
a. 2 Al (s) + 3 Cl2 (g)--------- 2 AlCl3 (s)
b. S (s) + O2 (g)--- SO2 (g)
c. CuO (s) + H2 (g)---- Cu (s) + H2O (g)
d. C2H4 (g) + H2 (g)------- C2H6 (g)
describe a simple battery, naming three essential parts
besides electricity, what do the fuel cells used on the space shuttle produce
Think of ways electricity might be distributed to consumers of electirc automboiles. Compare all the methods you have htough of with the mehtods used to distribute hydrocarbon fuels. List as many benefits and problems as you can for each
electric cars were popular in the early 1900. Why wer ethey replaced by cars that used an internal comustion engine?
Explanation / Answer
1. they both repreent one mole of each element
2. 2 moles of ocatane required 25 moles of oxygen { ((3n + 2) /2 ) where n is number of carbon atoms in alkane), to give 16 moles of carbon dioxide and 18 moles of water.
3. catalyst decreases the activation energy
4. All three will increase rate of reaction for an endothermic reaction and temperature will decrease the rate of exothermic reaction whil catalyst and conc will increase.
5. enzyme is general name of bio-catal.
6.in dynamic equilibrium reactants are converted to products and products are converted to reactants at an equal and constant rate.
7. reaction will move in forward direction
8. Will decrease the entropy due to decrease in number of moles in products as compared to reactants.
9. anode : the positively charged electrode by which the electrons leave an electrical device
Cathode : the negatively charged electrode by which the electrons leave an electrical device
Prim battery : once used cant be recharged
Sec battery : can be recharged after use
10 .Potassium ion is highly oxidized
11. Due to high concentration of oxygen in environment, it is considered as oxidizing
12.
a. 2 Al (s) ( reducing agent) + 3 Cl2 (g) (oxidizing agent )--------- 2 AlCl3 (s)
b. S (s)( reducing agent) + O2 (g) oxidizing agent --- SO2 (g)
c. CuO (s) oxidizing agent + H2 (g) ( reducing agent)---- Cu (s) + H2O (g)
d. C2H4 (g) oxidizing agent + H2 (g) ( reducing agent)------- C2H6 (g)
12. A simple battery is one with a simple electrical circuit - it consists of anode, cathode and electrolyte and a salt bridge to maintain the flow of electrons.
13. in space shutlle two section are there; power section, where the chemical reaction occurs, and a compact accessory section attached to the power section, which controls and monitors the power section's performance.
14. Electricity can be given with the usage of batter and usage of grid which is known as vehicle to grid.
The disadvantage of electricity usage in automobiles as compared to fuels is charging of battery atleast once in a day, which needs time.
15. The power generation was the problem with electric cars.
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