U1-Matter
U2-Moles
U3-Gasses
U4-Thermal
U5-Mixtures
100
What is evidence a chemical change occured?
Color change, bubbles, temperature change, and precipitate
100
Which sample would contain more atoms: 12g of C or 12g of Mg? Why?
12g of C, Carbon atoms have less mass; 12g of each, the smaller atom sample will contain a greater number of atoms.
100
What are three ways to increase the volume of a balloon.
-The number of particles increases
-Lower pressure outside balloon
-Warm the balloon
100
100 g of water was heated from 30*C to 80*C. The specific heat of water is 4.18 J/g*C
20,900 J
100
Why does increasing the surface area of a solute increase the rate of dissolving?
It increases the chance for collisions to happen.
200
List three intensive properties
Color, density, reactivity, state of matter, ect.
200
A sample of calcium has a mass of 80 g, how many moles are present?
2 moles ca
200
According to Kinetic molecular theory as temperature increases pressure increases because the particles move _________ colliding with the wall of the container _________ frequently.
Faster, more
200
Two gasses are placed in a container that reaches thermal equilibrium of 283 K. Describe the kinetic energy of the gasses.
Both gasses have the same average kinetic energy because they are at the same temperature
200
Now that you have avoided being grounded you get greedy and decide to add more sugar to the drink. How can you dissolve more sugar?
Increase the temperature.
300
List three extensive properties.
Mass, volume, length
300
Which has more mass? 2 moles of Iron (Fe) or 2 moles of Zinc (Zn)?
2 moles of Zinc
300
What is the volume of a balloon that contains 2 moles of carbon at 3 atm and 400 K?
21.89 L
300
Describe the change that occurs between points B→C.
The kinetic energy is constant & potential energy increases
300
You are not allowed to eat sugar. You sneak some sugar into your tea. Your parents walk into the room, see the sugar, and ground you. List three things you could have done to avoid being grounded.
-Crush the sugar (decrease the particle size)
-Heat the water
-Stir the tea
400
Why can intensive properties be used to identify a substance?
They do not change based on amount
400
6.02 x 1023 represents the number of atoms in 1 ____.
Moles
400
Label the variables: A given mass of air has a volume of 6.90 L at 273K, what is the new volume if the temperature is decreased to 240K?
V1 = 6.90L; V2 = ?; T1 = 273K; T2 = 240K
400
100 gram block of copper at 20 ∘C lowered into 100 grams of water at 100 ∘C. Heat will flow from ____ to ______ until it reaches ________?
The water to the copper until thermal equilibrium.
400
Define Solute and Solvent
Solute- Substance being dissolved
Solvent- What is doing the dissolving
500
Why cannot extensive properties be used to identify a substance?
They do change based on amount so it tells you almost nothing about composition without further study
500
Water has a density of 1. What should be the unit?
g/mL
500
What is the relationship between the Celsius(C) and Kelvin(K) Temperatures?
K = C+273
500
Which graph best represents the best thermal equilibrium graph to represent mixing 200mL of 90°C water with 50mL of 20°C water?
C - there is a larger volume of the higher temperature water, the equilibrium temperature will be closer to the higher temperature water.
500
Within a solubility curve, where would the points if there was an unsaturated, saturated, and supersaturated solutions.
Unsaturated Solution- All points below the curve
Saturated Solution- All points on the curve
Supersaturated Solution- All points above the curve