All chemical reactions involve an energy change. We categorise reactions by the direction of this energy change. If energy is released by a reaction, the reaction is exothermic. If energy is absorbed ...

These systems are characterized by alternating layers of reactive materials that can undergo exothermic reactions, releasing substantial amounts of heat. This heat can be harnessed for various ...

The slideshow describes an exothermic reaction between dilute sodium hydroxide and hydrochloric acid, and an endothermic reaction between sodium carbonate and ethanoic acid.

This video is about what exothermic and endothermic reactions are and how temperature changes can be used to identify which reaction is which. Exothermic reactions, in solution, give out energy ...

Amongst the many global efforts to enhance energy efficiency, cooling systems are seen by many as one of the best places to focus efforts. Cooling systems like your refrigerator and air conditioning ...

A reversible chemical reaction will proceed until it reaches equilibrium, a dynamic state where both the forward and reverse reactions are continuing, but the amount of reactants and products remains ...

Allergies are an immune system reaction to substances called allergens. The cause a range of symptoms from a stuffy nose to itchy eyes to difficulty breathing. How long allergies last varies based on ...

The good times come to an end as Chicago snaps Toronto's five-game win streak.

The Change Reaction founder Greg Perlman discusses how they’re working to help the community impacted by the California wildfires on ‘Fox News @ Night.’ ...

Reaction formation may be a temporary coping mechanism, but it’s unproductive in the long run. It ignores underlying beliefs or challenges that need to be addressed, which can hurt mental health.

Sarah Vine and Andrew Pierce bring their own no-holds-barred opinions, insights and reaction (clue is in the title) to the biggest stories of the week. New episodes every Wednesday, wherever you ...