Endothermic or exothermic reactions

• Science

Endothermic vs Exothermic

In this lesson-up you will prepare for the practicum about  endothermic and exothermic reactions

Do this lesson-up before the practicum so you know what you can expect

when a chemical reaction needs heat, it's called endothermic

endothermic

- put heat in reaction

- stop heating -> reactions stops as well

- examples:

1. frying an egg

2. water evaporation

3. melting ice

What safety precausions do you need to take in the lab?

1. wear safety goggles
2. wear a labcoat and close it
3. tie your (long) hair back
4. all of them

What is a risk of long hair that is not tied back?

exothermic reactions

- sometimes needs a little heat to start

- gives heat to enviroment. 

- does nog stop on its own unless reaction is over

Examples:

1. nuclear reaction

2. burning wood

3. combustion or explosion

chemical reactions that release thermal energy(heat) to the environment are called exothermic

what is this instrument
called?

1. bunsen burner with gasvalve
2. triflex with plate
3. tripod with gauze
4. graduated cilinder with water

In what position should the gas control and the air control be when you light your match to light up the bunsen burner?

1. gas control open air control closed
2. gas control closed air control open
3. gas control closed air control closed
4. gas control open air control open

In what position should the gas control and the air control be when you want a pause flame?

1. gas control open air control closed
2. gas control closed air control open
3. gas control closed air control closed
4. gas control open air control open

Are these reactions endothermic or exothermic