This is unfortunate, because it leads students to believe the activation energy is the change in the internal energy of the system, which is not quite true. E a measures the change in the potential energy of a pair of molecules that is required to begin the process of converting a pair of reactant molecules into a pair of product molecules. However this can vary according to where you live and your energy supplier. Economy 7 times will also change when the clocks go back or forward. Contact your provider to check if you are in any doubt.
Oct 17, 2008 · There are currently 186 operational windfarms in the UK (both onshore and offshore) with 2,120 turbines creating enough energy to power the equivalent of 1,523,052 homes and saving 6,156,175 ...
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