What are the three steps in the Mass-Mass process?
1. Mass A to Mole A
2. Mole A to Mole B
3. Mole B to Mass B
100
What does the law of conservation of energy state?
The energy in the Universe is constant!
100
What are the Units on Enthalpy?
Enthalpy is Heat and Heat is Energy... So it's a Joule!
100
The distance between two successive peaks or troughs in a wave is called
The wavelength
100
The lowest possible energy state an electron can have is called:
The Ground State! The Ground is the lowest place YOU can be!
200
How do I calculate the number of moles I have in step 1?
Given Mass from the problem/Molar Mass of the give compound
200
In an endothermic reaction, which way does energy flow?
Energy flows into the system in an endothermic reaction.
200
What are the Units on Specific Heat Capacity?
J/g *deg. C
200
A packet of energy of electromagnetic radiation is called
A Photon
200
Any energy state in which the electron has a higher energy than the ground state is called:
An excited state ( When you have energy you are EXCITED!)
300
When NH3 is prepared from 20 g N2, the theoretical yield of NH3 is 28 g. When this reaction is carried out in a given
experiment, only 25 g is actually produced. What is the percentage yield?
25g/28g x 100= 89%
300
When the system does work on the surroundings the sign of work is
negative (Think about working out at the gym, you LOSE energy)
300
The amount of energy needed to heat 1.00 g of carbon from 50.0°C to 80.0°C is 21.3 J. The specific heat capacity of this sample of carbon is (Hint: Use Q=smat or Q=mcat)
.71 J/g*deg. C
300
the number of waves that pass a given point per second is called
The Frequency
300
How many orbitals does the P orbital have?
3! It has a x, y, and z orbital. P has x,y,z, that's 3! Say it, it rhymes!
400
(mass-mass) What mass of oxygen would be required to completely burn 6.75 g of propane (C3H8)in the following
reaction?
C3H8(g) + 5O2(g) --> 3CO2(g) + 4H2O(g)
24.5g
400
A system absorbs 259 kJ of heat, and performs 195 kJ of work on the surroundings. what is *Delta*E of the system?
(Hint: *Delta E* = q + w)
+64 kJ
400
List the two steps on how to solve Enthalpy problems
1. Given Mass/Molar Mass = Moles
2. (Moles * delta H)/coefficient (or # moles given in problem)
400
Which color of visible light has the most energy per photon?
Violet (Remember ROYGBI*V*!)
400
The maximum number of electrons allowed in each of the p orbitals is
2! Each orbital can only hold 2 electrons! Like a shoe box!
500
(Limiting Reactant starting with grams) For the reaction CaCO3(s) + 2HCl(aq) --> CaCl2(aq) + CO2(g) + H2O(l),
68.1 g solid CaCO3 is mixed with 51.6 g HCl. What number of grams of CO2 will be produced?
29.9g
500
What do the q and w stand for in the delta E equation?
200 point bonus
What word(s) hint when each sign is positive? Which word(s) hint when each sign is negative?
q= heat
w=work
Positive
heat= ABSORBS
work = surroundings do work on the system
Negative
heat = RELEASES
work= system does work on the surroundings
500
When 1 mole of ethylene (C2H4) is burned at constant pressure, 2410 kJ of energy is released as heat. Calculate
*Delta*H for a process in which 10.0 g of ethylene is burned at constant pressure. (Enthalpy calculation)
-861 kJ
500
Write the relationships between the following wave properties.
Wavelength and Frequency
Wavelength and Energy
Frequency and Energy
The Longer the wavelength the Lower the frequency
The Longer the wavelength the Lower the Energy
The Higher the Frequency the Higher the Energy
500
What two things does the Pauli Exclusion Principle tell us about orbitals?
1. Each Orbital can only hold two electrons
2. Each Electron must have opposite spins
Remember the shoe box. Each holds two shoes facing opposite directions!