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20 Cards in this Set

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  • Back
What is temperature?
Temperature is a measure of the speed of the molecules. Instead of speed, you may also use velocity or kinetic energy
Does temperature determine how much heat is contained in a system?
No; temperature does not determine how much heat is contained in a system
How fast do Oxygen molecules travel?
Oxygen molecules (O2) at room temperature are moving at approximately 1000 miles per hour
What instrument measures temperature?
Temperature is measured using an instrument called a thermometer
What are the freezing point and boiling points in degrees Celsius?
In the Celsius scale, (formerly known as Centigrade) the freezing point of water is 0 degrees and the boiling point of water is 100 degrees
What is the formula for converting degrees Fahrenheit to degrees Celsius?
The formula for converting degrees Fahrenheit to degrees Celsius is °C = (°F– 32)5/9.
At what temperature do molecules lose motion?
This occurs at –273C.
What is the lowest possible temperature in Kelvins?
The lowest possible temperature (–273°C) is known as absolute zero or, on a new temperature scale, simply 0 K
How is Kelvins notated?
Simply K (kelvins)
What is the formula to convert to Kelvins?
The formula to convert to kelvins is K = °C + 273
What is the formula to convert from K to degrees Celsius?
The formula to convert from kelvins to degrees Celsius is°C = K – 273
What temperature will be used in objectives 3 and 4 and lesson 2?
All temperature must be in kelvins.
What is the symbol for Kelvin temperature?
The symbol for Kelvin temperature in all formulas will be T.
What is pressure?
Pressure is the measure of the force of collision between the molecules and the container wall.
What are the 4 units of measurement for pressure?
They are: atmospheres (atm), torr, mm Hg and the kilopascal (kPa).
What method will you use to convert pressure units?
To convert between pressure units, you will use factor-label (dimensional analysis) method.
What is the relationship between pressure units?
1 atm = 760 mm Hg = 760 torr = 101.3 kPa
Must I memorize these relationships?
You must memorize each of these relationships and be able to convert between any two of the pressure units.
What should I remember about scientific notation?
Remember to place all numbers which are less than 0.1 and greater than 1000 in scientific notation. In this course, we will also increase our range for acceptable answers. In Chemistry 47, you will be allowed plus or minus 2 in the third digit.
What do chemists use to measure air pressure?
Chemists use a mercury barometer to measure air pressure.