Quick Quiz U3AOS1 part 1

Which of the following is not characteristic of a reaction

in which energy is obtained from a fuel?

• It is exothermic.

• Chemical energy (enthalpy) is converted into other

  forms of energy.

• The combined enthalpy of the products is higher

  than that of the reactants.

• The enthalpy change (delta H) is negative.

• A

• B

• C

• D

Biodiesel manufactured from plant oils is an

increasingly important alternative to the petrodiesel

isolated from crude oil. The difference in the amount

of carbon dioxide generated by the combustion of

petrodiesel and biodiesel is very small, yet it is argued

that switching to biodiesel will reduce net greenhouse

emissions. This is mainly because:

• growing plant feedstocks for biodiesel production

  removes carbon dioxide from the air through

  photosynthesis

• the carbon dioxide produced by burning fossil

  fuels is a stronger greenhouse gas than the carbon

  dioxide produced by burning biofuels

• combustion of biodiesel produces fewer other

  greenhouse gases, such as methane

• biodiesel combustion produces significantly more

  energy, so less needs to be burnt for the same

  energy output.

Which of the following is a list of species which is

arranged in order of increasing oxidation number of

the nitrogen atoms?

• A

• B

• C

• D

Which of the following best describes the features of an

anode in a galvanic cell?

• A

• B

• C

• D