Health and safety regulations prevent the use of recycled PET for bottling Alpure water, resulting in a surplus of waste PET bottles. The economics of recycling are unattractive; it is decided instead...

Health and safety regulations prevent the use of recycled PET for bottling Alpure water, resulting in a surplus of waste PET bottles. The economics of recycling are unattractive; it is decided instead to burn the bottles, using the recovered heat to generate electricity.

(a) If the energy conversion efficiency from heat to useful electric power is 0.33, how much useful energy is recovered and how much CO2 is released by the combustion of 100 PET bottles weighing, in total, 4.0 kg?

(b) Compare this with the end-of-life credit for 100 PET bottles if they are, instead, recycled. The table lists the data you will need.