[F-Gas Category I] 06, Blends, Glide and the Pressure-Enthalpy Picture

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - The distinction between pure fluids, azeotropic blends (R-500 series), and zeotropic blends (R-400 series) with temperature glide. - How to apply bubble-point temperatures for liquid subcooling and dew-point temperatures for vapour superheat calculations. - The risk of refrigerant fractionation in zeotropic blends during vapour-phase leaks. - How to mentally navigate a pressure-enthalpy diagram with vertical pressure and horizontal enthalpy axes. - Regulatory scope differences across Great Britain, Northern Ireland, and the EU regarding F-Gas legislation. For independent study resources, practice questions, and exam prep tools, visit https://open-exam-prep.com/practice/uk-city-guilds-2079-l2-fgas and subscribe to our YouTube channel at https://www.youtube.com/@Open-exam-prep . Sources checked: September 28, 2026 - https://www.cityandguilds.com/qualifications-and-apprenticeships/building-services-industry/refrigeration-and-airconditioning/2079-f-gas-and-ods-regulations - https://www.gov.uk/guidance/qualifications-required-to-work-on-equipment-containing-f-gas - https://www.gov.uk/guidance/fluorinated-gases-f-gases - https://assets.danfoss.com/documents/latest/35513/AN227186438976en-000301.pdf - https://www.chemours.com/en/-/media/files/freon/temperature-glide-freon-mp-hp-407c-refrigerant-blends.pdf