Discuss the factors that affect the rate of reaction. comment on the importance of these factors when moving from lab through to commercial scale operation. [7 marks] (b) a reactant enters a 2 dm cstr at 1 mol dm and reacts as follows: 2a → r -a = 0.05 c2 mol dm-ºs find what feed rate ) will give an outlet concentration of (dm c = 0,5 mol dm3. min"

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.