Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Subjects > Year 8 Chemistry - Reactions > Flashcards

Year 8 Chemistry - Reactions Flashcards

1
Q

What is combustion?

A

Combustions the process where fuel burns in the presence of oxygen to produce heat or light.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is energy tranfersfers are involved in combustion?

A

Chemicals to heat energy, heat to light energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is thermal decomposition?

A

Thermal decomposition is a single compound breaking down into simpler compound or elements

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

If you heat Lead carbonate what is the product?

A

LEAD OXIDE + LEAD DIOXIDE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

If you heat copper carbonate what is the product?

A

COPPER OXIDE + COPPER DIOXIDE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

If you heat Zinc carbonate what is the product?

A

ZINC OXIDE + ZINC DIOXIDE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What happens to atoms and particles in chemical reactions?

A

The particles rearrange and the number of atoms is conserved.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Bond breaking is what?

A

Endothermic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Bond making is what?

A

Exothermic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Find the number of mole in 29 grams of water?(H20) RAM of Oxygen=16, RAM of hydrogen=1

A

1.61 MOLES

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Name some exothermic changes?

A

chemical reactions (combustion), freezing and condensing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the formula to figure out moles?

A

number of moles = mass (g) over relative formula mass

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is an exothermic change

A

exothermic change releases heat/energy into the surroundings

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is an endothermic change?

A

endothermic change absorbs energy from the surroundings

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Name some endothermic changes?

A

Melting & boiling, some chemical reactions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Mass is also conserved in physical changes. Name some

A

Ice-cream melting & water boiling

16
Q

,ass is also conserved in chemical changes. Name some

A

cooking an egg, burning wood

17
Q

what is it meant by the conservation of mass?

A

energy can’t be created or destroyed but only transferred/transformed

18
Q

In chemical reactions the total number of (BLANK) does not change. This means that the total mass of reactants (BLANK) the total of mass products. This is called (BLANK) of mass.

A

Atoms, equal, conservation

19
Q

How do you balance equations? use carbon

A

Write out the word equation (carbon+ 2 oxygen+ Carbon Dioxide)write the chemical symbols (c+02=c02) balance equation (this equation is balab=nced)

20
Q

How do you calculate masses?

A

Find mass of element (mg=0.14), burn element (mass of product = 0.40), write word equation ()mg+oxygen=magnesium oxide, magnesium rezvted wih oxygen and oxygen has its ownmass.
Total mass of Oxygen + o.24(mg) = 0.4
mass of Oxygen = 0.4-0.24=0.16
Oxygen mass = 0.16

Subjects (17 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions