Chem Quiz 2 Ca
Endothermic
+ Triangle H
exothermic
- triangle H
A 7.83 g sample of NaCl is dissolved in 90.00ml of ethyl alcohol solution
1.49M
Which of the following reaction is endothermic?
2nd option
Which of the following represents and exothermic reaction?
2nd option
How many g of water are required to be mixed with 11.75 g of HgCl in order to make a 0.01 m solution? (Refer to the periodic table for atomic weights.)
5,000g
Question 20
859 g/min
The curves represent two possible reaction paths for the decomposition of ammonia, NH3. One can correctly conclude from the graph that the heat of the reaction corresponds to the interval labeled:
A
Which of the following statements is FALSE concerning these factors?
A reaction occurs each time particles of the reactants collides
Catalyst
A substance that changes the rate of the reaction, and is not consumed in the reaction
1st graph
B
3rd graph
B
The curves represent two possible paths for the decomposition of ammonia, NH3. One can correctly conclude from the graph that the smallest activation energy shown for the decomposition of NH3 corresponds to the interval labeled:
B
One can correctly conclude from the graph that the largest activation energy shown for the decomposition of NH3 corresponds to the interval labeled:
E
Graph 4?
E2>E1 and Hrxn is positive
Increased temperature generally decreases the rate of a reaction:
False
The action of a catalyst can be explained in the following manner:
The catalyst makes it possible for the reaction to take place by another path that makes possible reaction at a lower space
Increased concentration generally increases the reaction rate:
True
The formation of a solid when two liquids are mixed indicates a reaction:
True
You many normally expect a slow reaction rate if a large A.E. is required:
True
One can correctly conclude from the graph that the best explanation for the difference between (I) and (II) is that:
a catalyst was added
solution
a uniform mixture of molecules or ions of one substance in another
molecular formation at the time of a reaction
activation complex
Raising the temperature of a reacting system increases the rate of the reaction, but does NOT increase the:
activation energy
affects the activation energy level
catalyst
2nd graph
endothermic
way to detect reactions
precipitation
solvent
that component of a solution which dissolves the solute
solute
the substance dissolved in a solution
Rate is related to:
time
