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Bromine gas in a container is heated over a flame. What happens to the average kinetic energy of the bromine particles?
A
It decreases rapidly.B
It increases quickly.C
It remains the same.D
It decreases slowly.22
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Which reaction is endothermic?
A
HCl + NaOH NaCl + H2O + 58 kJ
B
6CO2 + 12H2O + energy C6H12O6 + 6O2 + 6H2O
C
2Na + Cl2 2NaCl + energy
D
2C2H6 + 7O2 4CO2 + 6H2O + 2,502 kJ
23
Which is an aspect of the kinetic-molecular theory and can be used to explain the behavior of plasmas?
A
Particle spacing can allow a very high density.B
Particle kinetic energy is independent of temperature.C
Particles vibrate quickly in stationary positions.D
Particles exchange energy through elastic collisions.24
A substance is tested in a lab. It is found to maintain a unique shape and is a good conductor of electricity. If it is made up of electrons, protons, and neutrons, what state of matter is this substance most likely to be?
A
gasB
liquidC
plasmaD
solid25
The diagram below shows the different phase transitions that occur in matter. Which arrow represents the transition in which dew is formed?
A
1B
2C
4D
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