Name: Green Chemistry in Our Lives
Uploaded: 2019-07-19
Duration: 4 min 49 s
Description: Green chemistry provides a cost-effective approach to perform the processes that maintain the quality of the environment and reduce material, energy consumpt...

Question

Give the chemical equations involved in the ozone layer depletion by

{CF}_{2} {Cl}_{2}

.

Accepted Answer

The main reason of ozone layer depletion is believed to be the release of chlorofluorocarbon compounds (CFCs), also known as freons. Once CFCs $({CF}_{2} {Cl}_{2})$ are released in the atmosphere, they mix with the normal atmospheric gases and eventually reach the stratosphere. In stratosphere, they get broken down by powerful UV radiations, releasing chlorine free radical. That is,

${CF}_{2} {Cl}_{2} (g) \overset{UV}{\to} {Cl}^{∙} (g) + \overset{∙}{C} F_{2} Cl (g)$

The chlorine radical then react with stratospheric ozone to form chlorine monoxide radicals and molecular oxygen. That is,

${Cl}^{∙} (g) + O_{3} (g) \to {ClO}^{∙} (g) + O_{2} (g)$

Reaction of chlorine monoxide radical with atomic oxygen produces more chlorine radicals. That is,

${ClO}^{∙} (g) + O (g) \to {Cl}^{∙} (g) + O_{2} (g)$

The chlorine radicals are continuously regenerated and cause the breakdown of ozone. Thus, CFCs are transporting agents for continuously generating chlorine radicals into the stratosphere and damaging the ozone layer.

Give the chemical equations involved in the ozone layer depletion by ${CF}_{2} {Cl}_{2}$ .

Important Questions on Environmental Chemistry

Learn and Prepare for any exam you want !

Give the chemical equations involved in the ozone layer depletion by CF2Cl2.

Important Questions on Environmental Chemistry

Learn and Prepare for any exam you want !

Give the chemical equations involved in the ozone layer depletion by ${CF}_{2} {Cl}_{2}$ .