The overall balanced reaction of hydrogen and iodine monochloride in the gas-pha

Question

The overall balanced reaction of hydrogen and iodine monochloride in the gas-phase is H,(g) 21C -3 L(g) 2 HC The experimentally determined rate law is rate k H, ICI Match each label with the appropriate target on the energy profile, and answer the questions below. Hint: One target will not be used. activated complex #1 activation energy #1 reactants activated complex #2 activation energy #2 (a) Does the overall reaction absorb or release energy? O Absorbs energy O Releases energy O Cannot be determined (b) Choose possible reaction mechanism(s). H2(g 21CI(g) 2(g) 2HCl(g) slow Cl(g) ICI(g) -a 2(g) Cl2(g) fast H2(g) Cl2(g) 2HCl(g) slow H2(g) ICI(g) 3 HCI(g) HI(g) slow HI(g) ICI(g) HCl(g) 12(g) fast Cl(g) ICI(g) 2(g) Cl2(g) slow H2(g) Cl2(g) 2HCl(g) fast H2(g) CI(g) 3 HCI(g) HI(g) ast HI(g) ICI(g) HCl(g) 2(g) slow

Explanation / Answer

The rate of the raection is governed by the slow step of the mechanism

We see that,

Rate = K [H2] [ICl]

=> The slow step of the mechanism must contain H2 and ICl on the reactant side

We see this in the third option,

Hence the possible mechanism is

H2 (g) + ICl (g) -----> HCl (g) + HI (g) ...... SLOW

HI (g) + ICl (g) ------> HCl (g) + I2 (g) ..... FAST

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.