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Energy Changes end of topic test

Quiz by Gill

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15 questions
Show answers
  • Q1
    Which of the following processes absorbs heat energy from the surroundings?
    using a self heating can
    lighting a match
    using a sports injury pack
    setting off an explosion
    30s
  • Q2
    Which of the following is the best description for the activation energy of a chemical reaction?
    the minimum energy each partical needs to start moving
    the minimum energy to start a reaction
    the minimum temperature each particle needs to start moving
    the minimum temperature required to start a reaction
    30s
  • Q3
    Look at the diagram on the resource sheet. Which statement is correct?
    the energy change of reaction shows how much energy is taken in from the surroundings
    the products have more energy than the reactants
    the activation energy shows the highest temperature reached
    the reaction is exothermic
    30s
  • Q4
    Which of the following statements correctly describes part of what happens when a reaction occurs?
    bonds are broken in the products
    bonds are broken in the reactants
    energy is released in breaking bonds
    energy is required to form bonds
    30s
  • Q5
    Use the information on the resource sheet to calculate the heat energy change when hydrogen and chlorine react to form hydrogen chloride.
    1111KJ
    185 KJ
    247KJ
    1543KJ
    30s
  • Q6
    When 1 mole of hydrogen reacts with 1 mole of fluorine gas (equation on sheet) 542KJ of energy are given out. Suggest which of the following would be the energy change when 1 mole of hydrogent fluoride changes into hydrogen and fluorine.
    542 KJ energy are taken in
    271 KJ of energy are taken in
    542 KJ energy are given out
    271 KJ of energy are given out
    30s
  • Q7
    It is estimated that 200 g of sugar broken down in our body will release 1700 KJ of energy, which is needed for movement etc. Calculate how much energy 1 g of sugar taken in tea or coffee would release.
    8.5KJ
    200KJ
    5312.5KJ
    1700KJ
    30s
  • Q8
    The results given on the resource sheet were obtained while measuring the temperature changes in four reactions. The same apparatus was used in each case. Which of the following statements is correct?
    The precision of the thermometer was 1oC
    The range of the final temperatures was 16.1oC
    The experiment was not fair, since the starting temperatures were not the same for each reaction.
    The results should be plotted on a line graph.
    30s
  • Q9
    Hydrogen fuel cells have been trialled in a small number of vehicles. The hydrogen normally comes from natural gas. Which of the following is an advantage of using a hydrogen fuel cell rather than running an engine on petrol?
    Hydrogen is more easily stored than petrol.
    A hydrogen fuel cell produces more heat energy than burning petrol.
    Hydrogen is a renewable resource.
    A hydrogen fuel cell only released water in to the atmosphere
    30s
  • Q10
    Which of the following reactions occurs at the positive electrode in a hydrogen fuel cell? (See resource sheet)
    C
    B
    A
    D
    30s
  • Q11
    If two different metals are put into an electrolyte solution such as salt water, the voltage produced can be measured. Which pair of metals will give the highest voltage?
    magnesium and copper
    zinc and copper
    zinc and iron
    lead and silver
    30s
  • Q12
    Which of the following statements is incorrect?
    rechargeable batteries use reversible reactions
    a simple cell can be made by dipping two different metals in a solution
    batteries are two or more cells arranged in parallel
    all batteries are rechargeable
    30s
  • Q13
    Which of the following describes the positioning of elements in the modern periodic table? Elements are arranged in:
    horizontal groups with decreasing numbers of electrons in the outer shell
    horizontal periods with reducing numbers of electrons in the outer shell
    vertical periods with the same number of electrons in the outer shell
    vertical groups with the same number of electrons in the outer shell
    30s
  • Q14
    Complete the following sentence. Substances made up of small molecules:
    have covalent bonds between their molecules
    have strong ionic bonds between their molecules
    have strong intermolecular forces
    have weak intermolecular forces
    30s
  • Q15
    Iron oxide reacts with aluminium to form iron and aluminium oxide (equation on resource sheet). If 80g of iron oxide were reacted exactly with 27g of aluminium then:
    28g of iron and 102g of aluminium oxide would form
    56g of iron and 51g of aluminium oxide would form
    28g of iron and 51g of aluminium oxide would form
    56g of iron and 102g of aluminium oxide would form
    30s

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