7.9 Recall that changes in heat energy accompany the following changes: a) ____ dissolving in water b) neutralisation ____ c) ____ reactions d) precipitation reactions and that, when these reactions take place in ____, ____ changes can be measured to reflect the ____ changes. 7.10 Describe an ____ change or reaction as one in which heat energy is given out . 7.11 Describe an ____ change or reaction as one in which heat energy is taken in. 7.12 Recall that the breaking of bonds is endothermic and the ____ of bonds is exothermic. 7.13 Recall that the ____ heat energy change for a reaction is:a) ____ if more heat energy is released in ____ bonds in the products than is required in ____ bonds in the reactants b) ____ if less heat energy is ____ in forming bonds in the products than is required in breaking bonds in the ____.

Energy changes

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