Particles of a gas move independent of one another, they have a higher average kinetic energy, and they are perfectly elastic.
100
q of a system is also equal to what?
-q of surrounding or enthalpy change
100
What is kinetic theory
Kinetic theory states that a gas has a large number of rapidly moving particles and the rapidly moving particles constantly collide with each other and with the walls of the container
100
What is Calorimetry?
Colorimetry is the process of measuring the amount of heat absorbed or released in a chemical reaction
100
In what direction does heat flow
heat flows from warm areas to cooler areas
200
Describe what happens when a liquid changes into a gas on a subatomic level
when a liquid changes into a gas the ima's are weakened, the particles begin to move more rapidly and randomly, and the particles move further apart.
200
A piece of aluminum metal absorbs 455 J of energy, and its temperature rises bu 26 degrees Celsius. Calculate the mass of this piece of metal.
19.4
200
What is Hess's law
Hess's law states that regardless of the multiple steps of a reaction the total enthalpy change is the sum of all changes.
200
What is heat
Energy that is transferred during a chemical reaction
200
What two units are used to measure Heat flow
Heat flow is measured in calories or joules
300
List all five changes in state.
Deposition, evaporation, condensation, melting, and sublimation.
300
Phosphorus pentachloride absorbs 87.9kJ of energy per mole when it decomposes into phosphorus trichloride plus chlorine gas. Write a thermochemical equation for this reaction.
PCl5+97.9KJ=>PCl3+Cl2
300
What is Avogadro's hypothesis
Avagadro's hypothesis states that any two samples given the same temperature and pressure have the same number of particles
300
What is a System
A system is the part of a chemical reaction that is being focused on
300
What factors affect heat capacity
Heat capacity is affected my mass and chemical composition.
400
Describe why a liquid does not change temperature when boiling.
when a liquid boils the heated particles within the liquid are released in a gaseous state therefore the liquid has not changed temperature only the gas has.
400
What is 4.8 ATM in mmHG. in Torr. in Kpa
What is 3648 mmHG. 3648 Torr, 486 Kpa
400
Apply hess's law to 2CO +O2=>2CO2
Fe2O3+2Al=>Al2O3+2Fe enthalpy of -845.6 KJ
400
What is specific heat capacity
The amount of energy required to raise the temperature of one gram of a substance one degree celcius
400
Describe STP
STP stands for standard temperature and pressure.
Standard temperature is 0 degrees celcius
Standard pressure is 1 atm(760 mmHG, 101.3 kpa)
500
What is the difference between boiling and evaporation.
boiling happens throughout the entire substance while evaporation only happens at the surface.
500
An icepack is an example of what type or reaction exothermic or endothermic.
an icepack is an example of an endothermic reaction.