Endo and Exo process
In an endothermic process is heat absorbed or released
Absorbed.
What is the equation for kinetic energy
KE=1/2mv^2
If you have a c-c and a c=c which bond would have a bond enthalpy of 614 vs 348?
c-c is 348
c=c is 614
Melting is called "The heat of ______?"
Fusion
Why can't you trust an atom?
Because they make up everything.
In an exothermic process is the Delta H negative or positive.
Negative
The higher the temperature the higher the ______?
Average kinetic energy
if Cl2(g)->2Cl(g) has a change is H of +242KJ /mol
What would 2Cl(g)->Cl2(g) have?
-242KJ/mol
The heat of vaporization is the amount of heat required to _____ one gram of a liquid
Boil.
Why did the noble gas cry?
Because all his friends argon.
On an Endothermic graph the why is the Delta H positive?
Products have more potential energy than the reactants so this is why the Delta H is positive.
If you have two boxes of He gas and the box on the right has gas particles traveling faster than that of the one on the left which box will have a higher average kinetic energy.
The box on the right.
If you have CH4+2O2->CO2+2H2O What is Delta H?
=824KJ
What states of matter exist during the melting process?
Solid and liquid.
Want to hear a joke about potassium?
K.
In what situation would the temperature of the surroundings become warmer?
Exothermic.
If you have 2 samples of He gas. One sample is at T1 the second sample is at T2. If T1<T2. Which samples particles are moving faster ?
T2 sample.
What is the change is Hrxn of the equation CH4(g)+Cl2(g)->CH3Cl(g)+HCl(g)
-104KJ
Does the temperature of a substance change as it is boiled?
No.
Where do chemists put their dirty dishes?
In the zinc!
When you break high energy bonds what happens?
The breaking of bonds absorbs heat, but when you break high energy bonds weaker attractions between water molecules can happen.
When too objects particles meet and there is an energy transfer till both objects reach the same temperature. What is this called when both objects reach the same temperature?
Thermal Equailibrium.
If you have the equation 2H2(g)+O2(g)->2H2O(g) What is the change in H
-486KJ/mol
To freeze one gram of water what must be done?
334J must be removed from the system.
If you're not part of the solution, what are you?
You're part of the precipitate.