F3 Chapter 5 Thermochemistry(Intro 1)

F3 Chapter 5 Thermochemistry

INTRO 1

How to use

Work through the slides checking your understanding and complete the various tasks and questions as you go.

Multiple Choice

5. In which type of reaction is more energy required to break bonds than is given out when bonds are formed?

• exothermic

• endothermic

Multiple Choice

Thermochemistry is

• the study of heat changes when chemical reactions occur.

• the study of heat changes when physical reactions occur.

• the study of energy changes when chemical reactions occur.

Fill in the Blanks

Diagram shows reaction between sodium and water. The reaction is

Multiple Choice

Exothermic reaction is where heat is __________ to the surrounding

• taken in

• absord

• released

Multiple Choice

Endothermic reaction is when the heat is _________________ from the surrounding

• take in

• released

• taken out

Multiple Choice

Dissolving ammonium salt(ammonium nitrat) in water will cause a ___________ in temperature

• increase

• higher

• drop

• constant

Multiple Select

When sodium hydroxide is added to hydrochloric acid, the temperature reading on the thermometer is ______________ and the reaction name is __________________

• decreasing

• increasing

• constant

• neutralisation

• titration

Fill in the Blanks

Endothermic reaction that occurs in plants is

Fill in the Blanks

Exothermic reaction that occurs in animals is

Fill in the Blanks

The photo shows an application of thermal reaction to repair cracked or broken rails. Describe the application of the thermal reaction.

In the thermal reaction, the heating of iron(III) oxide and aluminum produces iron. The ( exothermic , endothermic ) reaction that takes place (releases , absorbes ) a lot of heat and ( melts , cools ) the iron. This molten iron is used to repair the crack part or reconnect the iron rails.

Fill in the Blanks

How does this cool pack function to lower an individual’s body temperature during fever?

• When a cold pack is squeezed, thin plastic separating water from solid ammonium nitrate will be torn.

• These chemicals then dissolve in water which is an ( exothermic , endothermic ) reaction.

• This causes the temperature of the pack to ( increases , decrease ).

Fill in the Blanks

Diagram below shows a polytrene cup used in an experiment to compare and contrast exothermic and endothermic reactions. Explain one advantage of using a polystyrene cup in this experiment.

Diagram below shows a polytrene cup used in an experiment to compare and contrast exothermic and endothermic reactions.

• Polystyrene is a good ( insulator , conductor )

•Heat change between the content of the cup and the surroundings is ( minimal , maximum )

• The temperature of the mixture in the cup can be measured accurately

Multiple Choice

When is the Earth Day?

• 3rd March

• 22nd April

• 5th June

Multiple Choice

When is the World Environment Day?

• 5th June

• 22nd April

• 3rd March

Multiple Choice

When is the World Wildlife Day?

• 22nd April

• 3rd March

• 5th June

Multiple Select

🥰Your favorite idol/idols is/are...

Multiple Select

Your favorite characters are ....🤗✌🤞💜