Which is conduction?(1 point)
A.) energy transfer from a reaction system to its surroundings
B.) energy transfer as electromagnetic waves
C.) energy transfer by currents of moving liquid or gas
D.) energy transfer by direct contact ***
What is a chemical reaction system?(1 point)
A.) the reactants and products in a reaction ***
B.) a diagram used to show energy changes in a reaction
C.) everything outside the reaction
D.) a container in which chemical reactions take place
In photosynthesis within one plant, other plants would be considered the _____(1 point)
A.) system
B.) products
C.) reactants
D.) surroundings ***
The products of a particular reaction have more energy than the reactants. Which type of reaction has occurred?(1 point)
A.) endothermic ***
B.) radiation
C.) exothermic
D.) convection
Which type of reaction is occurring during a fireworks show? How do you know?(1 point)
A.) It is an endothermic reaction. Heat must be added to light the fuses of the fireworks.
B.) It is an endothermic reaction. Fireworks are bright, indicating a release of light energy.
C.) It is an exothermic reaction. Fireworks are bright, indicating a release of light energy. ***
D.) It is an exothermic reaction. Heat must be added to light the fuses of the fireworks.
Would appreciate it if someone double checked what I have :)
1) energy transfer by direct contact
2) the reactants and products in a reaction
3) surroundings
4) endothermic
5) It is an exothermic reaction. Fireworks are bright, indicating a release of energy
I agree with your answers.
If you've got different questions, then the answers are:
1. Energy transfer by direct contact
2. The reactants and products in a reaction
3. Endothermic
4. It is an exothermic reaction. Fireworks are bright, indicating a release of light energy.
5. Heat causes fluids to become less dense; so warmer fluids rise above cooler fluids, transferring energy.