chemistry 0.0 / 5 ? ChemistryAtoms and compoundsGCSEAQA Created by: Lewys ThomsonCreated on: 14-06-16 12:31 What is the formula for calculating the rate of a reaction? Amount of product formed divided by time taken. 1 of 9 How can you speed up the rate of a reaction? increase temperature, use a catalyst, greater surface area. 2 of 9 How can you reduce costs of industrial reactions? use catalysts. 3 of 9 What does nano science refer to? structures that are 1-100mm in size a few hundred atoms. 4 of 9 What do nanoparticles have? highvsurface area to volume ratio. 5 of 9 What can nanoparticles lead to the development of? new computers/ highly selective sensors, cosmetics such as sun tan. 6 of 9 Where is energy transfered when chemical reactions take place? Energy is transfered to or from surroundings. 7 of 9 Can you name 2 chemical reactions that transfer energy to the surroundings? combustion, neutralisation, self heating cans. 8 of 9 Can you give to examples of chemical reactions that take heat from the surroundings? thermal decomposition, sports injury packs. 9 of 9
Comments
No comments have yet been made