Energy Calculations GCSE Chemistry AQA (higher)

Chapter 4 in the AQA GCSE Chemistry revision guide.
I have made 26 questions on practically every sentence in this topic :)

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What is produced when fuels burn?
thermal energy
1 of 24
how many joules in a calorie?
4.2
2 of 24
How do we measure the amount of heat produced when substances burn?
we use a caloriemeter
3 of 24
What is the simplest caloriemeter?
water in a glass beaker or metal can. The substance is burned and the temperature recorded
4 of 24
4.2 J of energy inreases the temperature of 1g of water by how much?
1oC
5 of 24
What is the activation energy?
energy needed to break bonds
6 of 24
What reaction is it when more energy is needed to break bonds than released when new bonds form?
endothermic
7 of 24
What reaction is it when more energy is released when bonds are made than when bonds are broken?
exothermic
8 of 24
What reaction is it when the line is negative on an energy graph?
exothermic
9 of 24
What is needed to break chemical bonds?
Energy
10 of 24
What is the amount of energy needed to break different bonds?
bond energy
11 of 24
What are they measured in?
KJ/mol
12 of 24
What is the first step to working out Q11?
Use the balanced equation for the reaction to find the number of each type of bond in the reactants
13 of 24
What is the second step to working out Q11?
Calculate the total amount of energy needed to break the bonds
14 of 24
What is the third step to working out Q11?
Use the balanced equation to find the number of each type of bond in the products
15 of 24
What is the fourth step to working out Q11?
Calculate the total amount of energy released when these bonds are made
16 of 24
What is the fifth step to working out Q11?
The difference between the two totals is the energy change for the reaction
17 of 24
What colour do Lithium ions turn when put in a flame?
bright red
18 of 24
What colour do sodium ions turn when put in a flame?
golden yellow
19 of 24
What colour do potassium ions turn when put in a flame?
lilac
20 of 24
What colour do calcium ions turn when put in a flame?
brick red
21 of 24
What colour do barium ions turn when put in a flame?
green
22 of 24
What colour do magnesium ions turn when put in a flame?
no colour
23 of 24
What forms when sodium hydroxide is added to solutions of these ions?
a precipitate forms
24 of 24

Other cards in this set

Card 2

Front

how many joules in a calorie?

Back

4.2

Card 3

Front

How do we measure the amount of heat produced when substances burn?

Back

Preview of the front of card 3

Card 4

Front

What is the simplest caloriemeter?

Back

Preview of the front of card 4

Card 5

Front

4.2 J of energy inreases the temperature of 1g of water by how much?

Back

Preview of the front of card 5
View more cards

Comments

Matt Pearson

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Question 12 is just a 'state the units' question- how are there so many questions working out how to solve it????

Matt Pearson

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Question 12 is just a 'state the units' question- how are there so many questions working out how to solve it????

Some like it hot

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It was meant to be Q11, but some stuff happened when i pressed save....and it all went wrong.
I fixed it though! 

Former Member

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hello i found this really useful but how do i do the quiz again? :)

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