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Labs
Definitions
Equations
Conversions/Sig Fig
Other
100
http://coseenow.net/gulf-of-mexico/files/2011/08/Distillation-Diagram.jpg
What is Simple Distillation (separates substances based on boiling point)
100
latent heat of fusion
What is the heat absorbed/released during a solid/liquid calorie change per gram
100
Density equation
What is D = m/v
100
calories to kcal
1000 cal = 1 kcal (1kcal/1000cal)
100
Chemistry is the study of ______ that is anything that has ____ and has a ______.
matter, mass, volume
200
What does a temperature of 40 C tell you about a sample of matter when compared to a sample of matter at 2.0 C.
the 40 C sample is hotter than the 2.0 C temperature sample because temperature is a measure of how hot/cold something is relative to set standards such as the freezing point of H2O is 0 C and boiling point is 100 C
200
Heat of vaporization
What is the amount of energy needed to convert one mole of liquid mass into a gas without a change in temperature
200
Hear released/absorbed
What is /\H = Q = m/\tc Heat released/absorbed = (mass of substance)(change in temperature of substance)(specific heat capacity)
200
calories to joules
1 cal = 4.18 J (4.18J/1 cal)
200
100.0 g of iron at 80 C into 10.0 g of water at 80 C Is heat transferred?
no, there is no difference in temperature so there is a balance in energy (heat travels only from hot to cold)
300
The procedure to determine the specific heat capacity of ethanol
What is 1. Determine the mass of the Styrofoam container 2. Determine the mass of the Styrofoam container and water 3. Determine the initial temperature of the water 4. Determine the mass of the beaker 5. Determine the mass of the beaker and ethanol 6. Determine the initial temperature of the ethanol 7. Pour ethanol into the water 8. Record the lowest temperature achieved by the water ethanol mixture
300
What are rgb codes and how are they responsible for the millions of colors that can be produced by computer screens?
RGB: red, green, and blue. We perceive colors with red, green, and blue colors. RGB codes are computer codes that go from 0 to 255. Computer codes are binary (on/off) 28 = 256 = 1 byte (each code = command)
300
Heat released/absorbed [latent heat of fusion/vaporization]
What is /\H = Q = mL(v f) or mL(v v) Heat released/absorbed = (mass of substance)(latent heat of fusion or vaporization)
300
specific heat capacity
What is m(v w)/\t(v w)c(v w)
300
Does a substance give off heat when changing phases
no (potential energy)
400
The method used to determine the heat of fusion of wax
What is 1. a) Determine the mass of an insulated container b) Add approximately 250 mL (250g) hot water to the container c) Determine the mass of the container and hot water d) Determine the initial temperature of hot water before the wax is added 2. determine the initial temperature of the wax (determine room temperature) 3. add the wax to the hot water 4. record the temperature of the water/wax just as the last piece of wax melts 5. determine the new mass of the water in the insulated container
400
What is the difference between precision and accuracy?
Precision involves the reproducibility of a measurement. If a device measures the mass of an object three times and the values are 1.25g, 1.24g, 1.26g than we would consider those values as precise or reproducible with the given instrument. If the accepted mass of the object was 4.56g we would still consider the measurements as precise, however we would not consider them accurate. Accuracy involves a comparison to a known standard, however many times in science there is not a known standard and therefore precision is important in order to draw conclusions.
400
Rate of Heat transfer
What is /\H/T
400
what is the sig fig of: 27,100 mg ; .0140 L ; 12.43 - 11 g
? , 3 , 1
400
Sources of Matter
What is ROCKS, MINERALS, ORES (metals, salt, tums, anything considered a compound) SALT/FRESH WATER (water, salt and minerals, hydrogen/oxygen) AIR (nitrogen, argon [light bulbs], oxygen) ORGANIC [PLANTS + ANIMALS] (food, fuels, fibers, wood, ect.) OIL/PETROLEUM (plastic, everything in organic except nutrients)
500
Electrolysis
using electrical energy to decompose a compound into it's elements. The electric power source supplies electrons through the negative cathode which attracts the positive metallic ion. At the positive anode electrons are lost and oxygen gas is formed.
500
the difference between distillation and fractional distillation
What is distillation is used to separate liquids whose boiling points have a variance of 70 C. Fractional distillation is used to separate liquids whose boiling points have a variance less than 70 C and requires less heat (column).
500
Time
What is /\H/Rate
500
What is the rule for adding/subtracting numbers and the rule for multiplying and dividing numbers
+ and - : round to least decimal (12.43 - 11 = 1) * and / : round to least digits (12.43 * 11 = 1.4 * 10^2)
500
Are you going to Ace this test?
Heck yeah!