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VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Chemistry => Topic started by: Cassidyhogi on April 08, 2017, 10:18:35 pm

Title: Chemistry AOS 1 Explanation questions
Post by: Cassidyhogi on April 08, 2017, 10:18:35 pm

Hi
So I got these explanation questions from my Heinneman textbook and 2017 Checkpoints and these are AOS 1 only.
Can someone please look at my answers, correct them and provide feedback on the way I write my answers and ways to strengthen them?
If you look at my responses you will obviously notice which questions I am struggling with.

I really appreciate your feedback  :)

Title: Re: Chemistry AOS 1 Explanation questions
Post by: Srd2000 on April 09, 2017, 01:36:46 pm

Hi, I've briefly read over your points. Most of them are good, try including an example. A lot of your definitions sound like dictionary definitions, they are accurate, but boring and not fun. Your teacher will expect a textbook definition, yet if you can include a reference to an experiment or something, you are almost guaranteed to get lots of marks because your teacher/examiner will remember what you did compared to everyone else; even if the theory is slightly off. The moral is you are demonstrating that you can apply the knowledge.

• A major renewable fuel source is the sun. The hydrogen in the sun is converted to energy, and this energy is then converted on earth into electrical energy, and the sun's energy is inexhaustible, unlike other nonrenewable fuels (such as coal)
• When H2O2 (hydrogen peroxide) is rapidly decomposed, it releases heat energy. Because there is a loss of energy from the system, then there is a negative ΔH value. This entails that it is an exothermic reaction
• When photosynthesis takes place, it requires extra energy to be added to the system. This added energy is sunlight. Because there is more energy in the system that what was started, then the value of ΔH is positive
• The anode cell has anions from the salt bridge go into the solution. Whilst the cathode cell has cations from the salt bridge. Because there are charged particles now in the solutions, a current is now possible.

I am not sure how relevant those examples are for you, but they are worth a thought.

Title: Re: Chemistry AOS 1 Explanation questions
Post by: Cassidyhogi on April 09, 2017, 09:05:54 pm

Wow thank you that really helps  :)
Yeah I think my teacher would prefer responses similar to your example ones.