C3F ~ Energy

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1. What is the reaction to show whether it is an exothermic reaction or endothermic on?

  • Measure the temperature of individual reactants and then mix them and measure the temp of the mixture.
  • Put to alkalis in a beaker, mix. Add the acid slowly and measure the heat.
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2. What is the equation for relating energy to SHC?

  • E= M x C x 'O' ( e- energy (J), M= mass (KG), 'O' = temp change in degrees C)
  • M=C x 'O' x E ( e- energy (J), M= mass (KG), 'O' = temp change in degrees C)
  • C= m x E x 'o' ( e- energy (J), M= mass (KG), 'O' = temp change in degrees C)

3. What is an endothermic reaction?

  • Reactions That take in energy from surroundings usually in the form of heat (shown by fall in temperature).
  • Reaction that gives out energy to surroundings usually in form of heat (shown by rise in temperature).

4. What is an exothermic reaction?

  • Reaction that gives out energy to surroundings usually in form of heat (shown by rise in temperature).
  • Reactions That take in energy from surroundings usually in the form of heat (shown by fall in temperature).

5. Do bonds break or are bonds formed in exothermic reactions?

  • form. Energy released when bonds form.
  • Break. Energy is taken in when bonds break (energy supplied to break bonds).

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