Thermal
Name that Reaction
Energy in a reaction
Chemical Reactions
Chemical changes
100
What does an exothermic reaction do with heat?
It gives off heat.
100
Name one exothermic reaction example
burning, fireworks, elephant's toothpaste
100
What happens to the energy/temperature of the surroundings during an exothermic reaction?
The surroundings get hotter (energy is released into them
100
Label the reactants and products
100
A substance must have a new ___________ __________ to show that there has been a chemical change
chemical formula
200
What does an endothermic reaction do with heat?
It takes in heat
200
Which kind of reaction feels cold: endothermic or exothermic?
Endothermic.
200
Is energy being absorbed or released in this reaction:
released
200
These are at the beginning of a reaction and combine together.
reactants
200
5 observable signs of a chemical change:
new gas (fizzing, bubbling, odor), precipitate, temperature change, permanent colour change, sound or light emission
300
In an exothermic reaction, does it get hotter or colder?
It gets hotter
300
Which kind of reaction feels warm: endothermic or exothermic?
Exothermic
300
Is energy being absorbed or released in this reaction:
absorbed
300
These are created in a reaction.
products
300
A new chemical formula means that the properties of the new substance:
a) is different
b) is the same
different
400
In an endothermic reaction, does it feel warmer or cooler?
It feels cooler
400
Is freezing exothermic or endothermic
Exothermic
400
What happens to the energy of the reaction during an endothermic reaction
The reaction takes in energy from the surroundings.
400
Chemical reactions ALWAYS involve breaking and reforming these?
bonds
400
Is this a chemical change? How do you know?
Yes
Chemical formula has changed
500
Give one example of an exothermic reaction
Burning wood, fireworks, a campfire, etc
500
Is melting ice exothermic or endothermic?
Endothermic
500
What breaks and forms to change the energy of the reactants and products?
chemical bonds
500
These types of reactions will NOT occur without a source of energy.
endothermic
500
What does the arrow mean?
"reacts to form"