Modified True/False. Indicate whether the sentence or statement is true or false. If false, change the identified word or phrase to make the sentence or statement true. 1. It is possible to use the units of seconds/mL to express rate. 2. The average rate of reaction can be determined by measuring the slope of a secant drawn on a graph of the reaction progress. 3. The reaction, Znt)+ 2HCZnCren+Hzn would probably proceed at a slower rate if the zinc 4. All of the particles involved in a reaction will have the same amount of kinetic energy 5. The overall order of reaction is the product of the individual orders of reaction for each reaction. was finely powdered 6. Rate law equations must be determined empirically. 7. The first step in a reaction mechanism is known as the rate-determining step.
Solution
1.Rate of reaction is defined as the moles of a species consumed/volume time. In case of heterogeneous reaction, it is expressed as moles of species consumed/ mass of catalyst.time. So it is not possible for the rate to have seconds/ml unit
2. the rate of reacting species A is given by –dcA/dt= K[A]n, the instantaneous rate is determined by drawing the slope of CA vs t. It is false
3. Powdered zinc provides more surface and more the surface and hence the reaction is faster. So false.
4. some particles in a reaction posses energy in excess of activation energy and they only participate in the reaction. So False.
5. The overall order of reaction is sum of powers of orders of reacting species. For example, for the reaction , rate r= K[A] n , [B] m , the order is n with respect to A, m with respect to B and overall is m+n.
6. rate law is r = K[A] n , where n is the order of reaction. The order is determined experimentally.
7. In a series of reactions, the slowest step will be the rate limiting step. It need not be first.
.
Modified True-False- Indicate whether the sentence or statement is tru.docx
1. Modified True/False. Indicate whether the sentence or statement is true or false. If false, change
the identified word or phrase to make the sentence or statement true. 1. It is possible to use the
units of seconds/mL to express rate. 2. The average rate of reaction can be determined by
measuring the slope of a secant drawn on a graph of the reaction progress. 3. The reaction, Znt)+
2HCZnCren+Hzn would probably proceed at a slower rate if the zinc 4. All of the particles
involved in a reaction will have the same amount of kinetic energy 5. The overall order of
reaction is the product of the individual orders of reaction for each reaction. was finely powdered
6. Rate law equations must be determined empirically. 7. The first step in a reaction mechanism
is known as the rate-determining step.
Solution
1.Rate of reaction is defined as the moles of a species consumed/volume time. In case of
heterogeneous reaction, it is expressed as moles of species consumed/ mass of catalyst.time. So it
is not possible for the rate to have seconds/ml unit
2. the rate of reacting species A is given by –dcA/dt= K[A]n, the instantaneous rate is
determined by drawing the slope of CA vs t. It is false
3. Powdered zinc provides more surface and more the surface and hence the reaction is faster. So
false.
4. some particles in a reaction posses energy in excess of activation energy and they only
participate in the reaction. So False.
5. The overall order of reaction is sum of powers of orders of reacting species. For example, for
the reaction , rate r= K[A] n
, [B] m
, the order is n with respect to A, m with respect to B and
overall is m+n.
6. rate law is r = K[A] n
, where n is the order of reaction. The order is determined
experimentally.
7. In a series of reactions, the slowest step will be the rate limiting step. It need not be first.
![Modified True/False. Indicate whether the sentence or statement is true or false. If false, change
the identified word or phrase to make the sentence or statement true. 1. It is possible to use the
units of seconds/mL to express rate. 2. The average rate of reaction can be determined by
measuring the slope of a secant drawn on a graph of the reaction progress. 3. The reaction, Znt)+
2HCZnCren+Hzn would probably proceed at a slower rate if the zinc 4. All of the particles
involved in a reaction will have the same amount of kinetic energy 5. The overall order of
reaction is the product of the individual orders of reaction for each reaction. was finely powdered
6. Rate law equations must be determined empirically. 7. The first step in a reaction mechanism
is known as the rate-determining step.
Solution
1.Rate of reaction is defined as the moles of a species consumed/volume time. In case of
heterogeneous reaction, it is expressed as moles of species consumed/ mass of catalyst.time. So it
is not possible for the rate to have seconds/ml unit
2. the rate of reacting species A is given by –dcA/dt= K[A]n, the instantaneous rate is
determined by drawing the slope of CA vs t. It is false
3. Powdered zinc provides more surface and more the surface and hence the reaction is faster. So
false.
4. some particles in a reaction posses energy in excess of activation energy and they only
participate in the reaction. So False.
5. The overall order of reaction is sum of powers of orders of reacting species. For example, for
the reaction , rate r= K[A] n
, [B] m
, the order is n with respect to A, m with respect to B and
overall is m+n.
6. rate law is r = K[A] n
, where n is the order of reaction. The order is determined
experimentally.
7. In a series of reactions, the slowest step will be the rate limiting step. It need not be first.](https://image.slidesharecdn.com/modifiedtrue-false-indicatewhetherthesentenceorstatementistru-230206004128-5e944fc0/85/Modified-True-False-Indicate-whether-the-sentence-or-statement-is-tru-docx-1-320.jpg)
