Answers: Exercise 3_5 Enthalpy of Combustion

1.  C
2.  C
3.  A
4.  D
5.  A
6.  B
7.  C
8.  C
9.  D
10.  D

 

11.
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12.
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 13.  
B
 14.
 15.
 Open ended question
Chemistry Concepts [not exhaustive]
  • Also removes glucose present in food which will alter flavour/ make less palatable
  • Also removes water from food which will dehydrate food/ make less palatable
  • Hydrogen peroxide will decompose slowly releasing oxygen [and water]
  • Observation that hydrogen peroxide decomposition occurs in light/ distinguish storage conditions
 Chemistry Skills
 Appropriate balanced chemical equations for decomposition of hydrogen peroxide

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