Consider the following mechanism: Cl2 ⇌ 2Cl
Cl+ CO ⇌ COCl
COCl + Cl2 ⇌COCl2 + Cl
2Cl ⇌ Cl2

Determine if each statement is true or false.

a. Cl is an intermediate and a catalyst.
b. COCI is the only intermediate
c. Cl is a catalyst
d. Both Cl and COCI are intermediates

d. Both Cl and COCI are intermediates.

Explanation:

Hey there!

In this case, according to the given mechanism:

Cl2 --> 2Cl

Cl+ CO --> COCl

COCl + Cl2 --> COCl2 + Cl

2Cl --> Cl2

We can see that the overall reaction, omits the presence Cl, COCl and the result is:

Cl2+CO-->COCl2

Which means d. Both Cl and COCI are intermediates.

Regards!

nuclear fission produces elements that are heavier than helium.

the elements that are used in nuclear fission and their products are much heavier than helium.

a). in this case, dh> 0 and sd> 0. if t becomes larger, the term "-tds" will become more negative. at some point, it is possible that -dts will be more negative than the dh is positive, and the reaction will become spontaneous. this is probably the correct answer, but you should look at all of the other possibilities and make sure of that.