GCSE Chemistry OCR B J258

C1.2: Why are there temperatures changes in chemical reactions?

#C1.2.1

distinguish between endothermic and exothermic reactions on the basis of the temperature change of the surroundings

#C1.2.2

draw and label a reaction profile for an exothermic and an endothermic reaction, identifying activation energy

#C1.2.3

explain activation energy as the energy needed for a reaction to occur

#C1.2.4

interpret charts and graphs when dealing with reaction profiles

#C1.2.5

calculate energy changes in a chemical reaction by considering bond breaking and bond making energies

#C1.2.6

carry out arithmetic computations when calculating energy changes

#C1.2.7

describe how you would investigate a chemical reaction to determine whether it is endothermic or exothermic

#C1.2.8

recall that a chemical cell produces a potential difference until the reactants are used up

#C1.2.9

evaluate the advantages and disadvantages of hydrogen/oxygen and other fuel cells for given uses

C1.1
How has the Earth's atmosphere changed over time, and why?
C1.3
What is the evidence for climate change, why is it occurring?