y9 EXOTHERMIC AND ENDOTHERMIC

Question 1

A student added salt to water.The system temperature increases. Conclusion: it is endothermic.

Accepted Answer

False

Question 2

A container heats up when magnesium ribbons is added to dilute sulfuric acid.

Accepted Answer

It is exothermic

Question 3

What are the products for photosynthesis?

Accepted Answer

sugar+ oxygen

Question 4

Which process taking place in the human body is similar to combustion?

Accepted Answer

Respiration

Question 5

Exothermic or endothermic? Respiration

Accepted Answer

Exothermic

Question 6

The chemical equation below shows an ______________ reaction.

Accepted Answer

Endothermic

Question 7

What chemicals are fuels usually made of?

Accepted Answer

Hydrocarbons

Question 8

The process used by plants to convert energy from thesun into chemical energy is

Accepted Answer

photosynthesis

Question 9

What is necessary for a chemical reaction to occur?

Accepted Answer

Both of these

Question 10

What products are formed by complete combustion?

Accepted Answer

Carbon dioxide + Water

Question 11

True or false: Endothermic reactions absorb energy from the surroundings.

Accepted Answer

True

Question 12

Exothermic or endothermic?

Accepted Answer

Exothermic

Question 13

If ΔH is positive, the reaction is...

Accepted Answer

Endothermic

Question 14

What is an endothermic reaction?

Accepted Answer

More energy in than out when bonds break

Question 15

What type of reaction is it? Mg + O2 + → MgO H= 601KJ

Accepted Answer

endothermic

Question 16

True or false: Bond breaking is exothermic.

Accepted Answer

False

Question 17

Which diagram would the reaction go faster?

Accepted Answer

left

Question 18

Whenfossil fuels are burnt to provide energy, they react with

Accepted Answer

oxygen

Question 19

What is combustion?

Accepted Answer

Substance reacts with oxygen and heat is released

Question 20

In an Exothermic Reaction have energy as a

Accepted Answer

Reactant

Question 21

What does an exothermic reaction transfer to its surroundings?

Accepted Answer

Energy

Question 22

Why did Australia lose the World Rugby Cup?

Accepted Answer

All of the above

Question 23

What is the sign on ΔH for exothermic changes?

Accepted Answer

Negative

Question 24

How does a reaction occur?

Accepted Answer

The bonds are broken

Question 25

Respirationis an example of :

Accepted Answer

anexothermic reaction

Question 26

Exothermic or Endothermic?

Accepted Answer

Endothermic

Question 27

Plants carry out photosynthesis using sunlight. Where is the sun's energy mainly stored?

Accepted Answer

Glucose

Question 28

Which reaction below would be classified as acombustion reaction

Accepted Answer

propane+ oxygen ---> carbon dioxide + water

Question 29

Exothermic or Endothermic? Burning wood.

Accepted Answer

Exothermic

Question 30

Is this equation shown in the picture an endothermic or exothermic reaction?

Accepted Answer

Endothermic Reaction

Question 31

Classify as endothermic or exothermic. 2Na + Cl2 --> 2NaCl + ENERGY

Accepted Answer

Exothermic Reaction

Question 32

if a 1 story house was all pink that color is the stairs???????????

Accepted Answer

there are no stairs

Question 33

On which side is the product located?

Accepted Answer

right

Question 34

True or False: The activation energy = energy of the products minus energy of the reactants.

Accepted Answer

False

Question 35

Photosynthesis is an example of

Accepted Answer

anendothermic reaction

Question 36

The heat of reaction (∆H) is

Accepted Answer

80KJ

Question 37

The following equation is

Accepted Answer

respiration

Question 38

An endothermic reaction causes its surroundings to get...

Accepted Answer

Colder

Question 39

What happens to energy in an endothermic reaction?

Accepted Answer

Taken from its surroundings

Question 40

Exothermic or endothermic? Baking a cake.

Accepted Answer

Endothermic

Question 41

If bonds are broken, energy is absorbed and you are

Accepted Answer

endothermic

Question 42

To find ΔH, perform the following calculation

Accepted Answer

products - reactants

Question 43

Which Soccer Player Is This?

Accepted Answer

Lionel Messi

Question 44

The activation energy of this reaction is

Accepted Answer

160KJ

Question 45

During a _________________ reaction, chemical bonds fond causing heat to be released.

Accepted Answer

Exothermic

Question 46

. In a reaction where products have more energy than the reactants

Accepted Answer

it is an endothermic reaction

Question 47

TRUE OR FALSE: In all chemical reactions, energy is either ABSORBED or RELEASED.

Accepted Answer

TRUE

Question 48

Which of the following processes is exothermic?olecules in the ice as the ice is heated?

Accepted Answer

Steam condensing

Question 49

True or False? Exothermic reactions release energy to the surroundings

Accepted Answer

True

y9 EXOTHERMIC AND ENDOTHERMIC

Questions 49

y9 EXOTHERMIC AND ENDOTHERMIC

Questions 49