Question

Question
1
Question
2
Question
3
A)
Which is
conduction
?
(1 point)
energy transfer by direct contact
energy transfer by currents of moving liquid or gas
energy transfer as electromagnetic waves
energy transfer from a reaction system to its surroundings
A)
What is a
chemical reaction system
?
(1 point)
everything outside the reaction
a container in which chemical reactions take place
the reactants and products in a reaction
a diagram used to show energy changes in a reaction
A)
In photosynthesis within one plant, other plants would be considered the _____
(1 point)
reactants.
products.
surroundings.
system.
Question
4
Question
5
A)
The products of a particular reaction have more energy than the reactants. Which type of reactionhas occurred?
(1 point)
endothermic
radiation
exothermic
convection
A)
Which type of reaction is occurring during a fireworks show? How do you know?
(1 point)
It is an exothermic reaction. Heat must be added to light the fuses of the fireworks.
It is an exothermic reaction. Fireworks are bright, indicating a release of light energy.
It is an endothermic reaction. Heat must be added to light the fuses of the fireworks.
It is an endothermic reaction. Fireworks are bright, indicating a release of light energy.

Answer 1

1) Conduction = energy transfer by direct contact.

2) A chemical reaction system = the reactants and products in a reaction.

3) In photosynthesis within one plant, other plants are the surroundings.

4) If products have more energy than reactants, the reaction is endothermic.

5) Fireworks: It is an exothermic reaction — fireworks release energy (light and heat), so the reaction gives off energy.