8.1/8.2
which would cause a faster reaction, increasing the surface area or decreasing the temperature?
Increasing the surface area
What does Endothermic mean?
A reaction that absorbs heat from around it.
What will happen according to Le Chatelier's principle when you raise the temperature?
The system will shift right
As the temperature of a system increases the entropy of the system
Increases
What numbers did we wear in our sports this year?
Grafton-8
Abby-6
If a seltzer tablet was added into two beakers of water but one breaker of water was at room temperature and the other was at 100 C, which would have a faster reaction time?
Beaker at 100 C
Find the heat of the reaction
PE reactants=676.7 kJ, PE products=414.1
-262.6 kJ
What will happen according to Le Chatelier's principle if you were to add reactants?
the system will shift right
What are the two tendencies in nature?
Be in a state of lower energy and of greater disorder
Where are we going to college? And what sports are we playing?
Grafton-George Fox-track
Abby-Maryville College-soccer
Oxygen behaves least like an ideal gas under____temperature and___pressure.
Low High
If the change in heat is positive what type of reaction is it?
endothermic
What will happen according to Le Chatelier's principle if you increase pressure?
The system will shift left
As a substance moves from a solid to a liquid, what happens to the entropy?
It increases
Where are we working this summer/ what are we doing for work?
Grafton-Lifeguard-camp arrah wanna
Abby-journalist-Sandy Historical Museum/The Sandy Standard
if a gas occupies a volume of 350 mL at 0C with standard pressure, how much will the volume be if the temperature is increased to 35 C?
395 mL
What does a catalyst do?
-Lowers activation energy
-speeds up reaction
Consider the following equation N2+3H2----2NH3+heat. What would make the equilibrium shift right?
Add reactants, or increase the temperature
If a reaction where bonds are being formed occurred, which side of the reaction will energy be on?
The right side with the products
What were the best classes in high school to us?
Grafton-Economics
Abby-Newspaper
What volume will a 500mL sample of a gas at STP occupy when the pressure is doubled at constant temperature?
250mL
If the energy graph ends at a lower point then it started is it Endo or exothermic?
Exothermic
If water is at 0 C in equilibrium, what is the physical state of the water?
Both liquid and a solid
The dissolution of ammonium nitrate in water is a spontaneous endothermic process. It is spontaneous because the system undergoes __________
a. a decrease in enthalpy.
b. an increase in entropy.
c. an increase in enthalpy.
d. a decrease in entropy.
e. an increase in free energy.
b. an increase in entropy.
When are our birthdays?
Grafton-10/29/2007
Abby-05/23/2008