Module 8
What does exothermic and endothermic mean?
Exothermic: heat is exiting the system
Endothermic: heat is entering the system
What unit do we use for enthalpy?
KJ/mol
What are the formulas for the speed of light and the speed of wave?
speed wave: u=λν
speed light: c= λν
To infinity and beyond
Toy story
What is the lightest element?
Hydrogen
What does Work ON the system/gas and Work BY the system/gas represent?
ON: Gains energy w>0
BY: Loses energy w<0
Direct and Indirect Method
What is Planks Constant?
6.63 x 10^-34
Ohana means family. Family means nobody gets left behind or forgotten.
Lilo and Stitch
What the only letter that doesnt appear in the periodic table?
J
Give me all the formulas for moduel 8 (work and calorimetry)
w=-P∆V , q=ms∆T , q=C∆T , -qa=qb
What is enthalpy?
Measure of energy in thermodynamic system
A sound wave travels through air at a speed of 343 m/s. If a person claps their hands, how far away can someone hear the clap if it takes 2 seconds for the sound to reach them?
686 m
Float like a Cadillac, sting like a Beemer
Cars
What is the chemical name for water?
Calculate the work in (Joules) in 25 degrees Celsius, the temperature will increase from 0.05L to 0.13L with a pressure of 1 atm?
-8.10600 J
What is the enthalpy of Na2O? balance the equation!!
Na(s) + O 2(g) → Na 2O(s)
If the entalphy of Na is -143.4 KJ/mol and the enthalpy of the reaction is -372.6 KJ/mol.
-258 KJ/mol
A wave with a frequency of 14 Hz has a wavelength of 3 meters. At what speed will this wave travel?
42 m/s
Bazinga!
Big bang theory
Ice is bigger than water? (T or F)
True
Find final temperature if you have 7.41 KJ heat added to 329 ml of water at a initial temperature of 20.3 degrees Celsius. (Specific heat of water 4.184)
25.77 Celsius
Find enthaply of this reaction: C(s)+H2O(g)→CO(g)+H2(g)
C(s) + O2 (g) → CO2 (g) ∆H=-393 kJ/mol
2H2(g)+O2(g)→2H2O(g) ∆H=-484 kJ/mol
2CO(g)+O2(g)→2CO2(g) ∆H=-566 kJ/mol
132 KJ/mol
Calculate the energy and frequency of red light having a wavelength of 6.80 x 10-5 cm.
E = 2.92 x 10-19 J
Frequency= 4.4 x 1014 Hz
My anxieties have anxieties
Charlie Brown/Snoopy
Helium is lighter than air? (T or F)
True