Question 15 0 4.77 pts lf a reaction has a high activation energy. What is true

Question

Question 15 0 4.77 pts lf a reaction has a high activation energy. What is true about the rate of reaction? O It is likely to be a slow reaction. It is likely to be a fast reaction. lt is likely to be a fast reaction and the rate of reaction will decrease as the temperature is increased. The rate of reaction will decrease as the temperature is increased Question 16 0/4.77 pts lf reaction A occurs quickly at room temperature and reaction B will not occur unless heated to 500°C. Which statement is true? Reaction A has no activation gneny Reaction B has a higher activation energy than reaction A. Reaction A has a higher activation energy than reaction B. None of these are true

Explanation / Answer

Q15

if Ea is high, then

it is going t be SLOW, since it requires energy, chose A

Q16

if A occurs quickly and B will not ...

NONE of above are true, note that we are now talking about thermodynamics, i.e. equilibrium, when we state that B will not react until T = 500°C

Q17

As we increase T

the average kinetiv energy increases

also, the particles collide since they have higher T

so

choose "Both of increases are true"

Q21

if low activation energy, we require less energy per reaction, so expect it to be faster, choose

more rapidly

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