This week we will be attempting our first internal assessment. It is in two parts; first there is the practical activity which will be completed in rooms A2 and A3. The second part of the assessment is the written questions and essay which will be done in class by Friday. Don't forget that you can use the information in your soft covered exercise book to help you with the essay questions.
In order to prepare for your assessment make sure you have completed research tasks one and two and review the key task practical activities.
Good Luck with your assessment!
Showing posts with label Carbon compounds. Show all posts
Showing posts with label Carbon compounds. Show all posts
Saturday, March 9, 2013
Friday, March 1, 2013
Working out energy content in fuels
During the last couple of weeks we have been doing a lot of practical activities based around the energy content of fuels. It is a simple process involving heating water with a flame produced by either burning wax, natural gas or ethanol.
Scientists have found that it takes 4.2 Joules of energy to heat 1ml of water by 1 degree C. So as long as we know how many mls of water we are heating and how long it takes and by how much the temperature increases we can calculate the amount of energy produced per unit of time. If we know also how much fuel was consumed (burnt) for example by weighing the fuel before and after heating the water we can calculate how much energy is produced per gram of fuel. This can be used to compare the energy content of our fuels.
Scientists have found that it takes 4.2 Joules of energy to heat 1ml of water by 1 degree C. So as long as we know how many mls of water we are heating and how long it takes and by how much the temperature increases we can calculate the amount of energy produced per unit of time. If we know also how much fuel was consumed (burnt) for example by weighing the fuel before and after heating the water we can calculate how much energy is produced per gram of fuel. This can be used to compare the energy content of our fuels.
Energy content in ethanol
Wednesday, February 27, 2013
Carbon compounds as fuels
Right now you should be completing the two research tasks as you prepare for the internal assessment. If you have any questions about the assessment please make sure you ask your teachers for help.
Tuesday, February 12, 2013
Friday, March 30, 2012
Investigating Carbon Compounds as Fuels
Monday, March 19, 2012
Week Eight
Dear Students
On Thursday 23 March during your regular Science spell you will be completing the Essay question for our first Internal Assessment. You will also need to hand in your exercise book with the key tasks completed.
In order to give yourself the best possible opportunity to succeed please review the two research assignments about the implications of the use of fossil fuels and bio-fuels and key task four about the number of carbon atoms in an alkane and how that effects it's properties.
You can find electronic copies of the research assignments on our year 11 science blog. http://11scihvhs.blogspot.co.nz/
Good luck from
Mr Edwards
PS Don't forget to bring your text books to class for our new topic.
Thursday, March 15, 2012
Monday, March 12, 2012
Tuesday, March 6, 2012
Acid Test: The Global Challenge of Ocean Acidification - YouTube
Sometimes called the other Carbon Problem
Monday, March 5, 2012
Sunday, February 26, 2012
Advantages and Disadvantages of Biofuels
Advantages and Disadvantages of Biofuels: "Primary Advantages and Disadvantages of Biofuels
No fuel source is completely positive or completely negative. Consumers need to weigh the pros and cons of biofuels to determine whether they feel comfortable with this emerging resource as an alternative to traditional fuels."
'via Blog this'
No fuel source is completely positive or completely negative. Consumers need to weigh the pros and cons of biofuels to determine whether they feel comfortable with this emerging resource as an alternative to traditional fuels."
'via Blog this'
Friday, February 24, 2012
Saturday, February 18, 2012
Homework
Currently you homework is to be completing the first research task which was handed out this week. You should do this in your exercise book so it can be ticked off as part of the assessment. If you need another copy of the assignment you can down load it from the links on the right hand side of this page or click here.
11 Science 2012
We have begun the year with a topic that looks at the implications of using carbon compounds as fuels. So far we have met a family of hydrocarbons known as the alkanes. These are the compounds found in petrol, diesel and LPG and are currently being used around the world in enormous quantities.
In our practical work we've been comparing complete and incomplete combustion using the laboratory Bunsen burners.
We have also attempted to calculate the amount of energy produced from a candle flame.
In our practical work we've been comparing complete and incomplete combustion using the laboratory Bunsen burners.
We have also attempted to calculate the amount of energy produced from a candle flame.
Monday, February 28, 2011
Energy in candle wax
4.2 joules of energy is required to raise the temperature of 1ml by 1 degree Celsius.
Saturday, February 26, 2011
Week five term one
Homework this week is to finish the research assignment on alcohol/bio-fuel. This research should be completed by Thursday 3 March.
Wednesday, February 23, 2011
Year 11 Science 2011
Tuesday, February 22, 2011
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