GWP of HFOs and HCs relative to HCFCs are close.

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Prepare for the SkillCat EPA Type 2 Test with interactive flashcards and multiple-choice questions. Each question is accompanied by hints and explanations. Get ready to pass your exam!

Multiple Choice

GWP of HFOs and HCs relative to HCFCs are close.

Explanation:
Global warming potential compares how much heat a substance traps in the atmosphere over a set time, relative to CO2. HCFCs have high GWPs because they are long-lived in the atmosphere and contain halogens that make their infrared absorption persist over time. In contrast, HFOs are designed to break down quickly and have very low long-term warming effects, giving GWPs typically in the single digits. Hydrocarbons carry no halogens and also break down rapidly, so their GWPs are likewise in the low single digits. Because of these big differences in persistence and infrared impact, the GWPs of HFOs and hydrocarbons are not close to those of HCFCs.

Global warming potential compares how much heat a substance traps in the atmosphere over a set time, relative to CO2. HCFCs have high GWPs because they are long-lived in the atmosphere and contain halogens that make their infrared absorption persist over time. In contrast, HFOs are designed to break down quickly and have very low long-term warming effects, giving GWPs typically in the single digits. Hydrocarbons carry no halogens and also break down rapidly, so their GWPs are likewise in the low single digits. Because of these big differences in persistence and infrared impact, the GWPs of HFOs and hydrocarbons are not close to those of HCFCs.

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