307K views · 4.2K reactions | Free energy is a thermodynamic quantity that measures a system's ability to perform work. The two main types are Gibbs free energy (used for constant pressure and temperature) and Helmholtz free energy (used for constant volume and temperature). A negative change in free energy indicates a spontaneous process | Mohammadiqbal | Facebook

131 reactions · 11 comments | Your Reliabe Solar Plug   Solar...

Did you know that food waste can be recycled into renewable energy to generate electricity, fuel transport and create fertiliser. 😮 So think about the street lights, buses, trains and even your car - food waste has a part to play. A 5-litre kitchen caddy, compostable bags and an outdoor caddy is all you need to get started on recycling more of your food waste. These are free for residents when you sign-up for this service online. Find out more at www.hillingdon.gov.uk/food-waste | London Boroug