Measurement
what is the typical units of velocity?
m/s
1 atm = how many mmHg?
what is the equation for q?
q = mc∆T (or MCAT!!)
what is the term for a solid turning into a gas (directly, no intermediate to liquid)
sublimation
What does the van der waals equation do?
corrects for deviations from ideal behavior
Which is NOT a unit of temperature?
Celcius, Fahrenheit, Kelvin, Calorie
Calorie
1 inch is how many centimeters?
2.54 cm
what is enthalpy equal to under constant pressure?
heat (q)
what is a closed system?
a system that can exchange energy but NOT matter with its surroundings
Henry's Law applies to which of the following:
Partial Pressure
Vapor Pressure
Temperature
vapor pressure
partial pressure is Daltons law of partial pressures
the wavelength of light is typically measured in...
nanometers
10,000 nm is how many mm?
nano = 10^-9. mm = 10^-3
difference of 10^6
divide 10,000 by 1,000,000 = 0.01 mm
define system and surroundings
system = matter/thing being observed
surroundings = everything outside of that system
what is the zeroth law of thermodynamics?
objects are in thermal equilibrium only when their temperatures are eual
What is the ideal gas law?
PV = nRT
A box is measured as 10 cm x 5 cm x 0.010 m
What is the volume of the box?
10*5*1 = 50 cm3
50 cm3 is how many liters?
50 cm3 = 50 mL / 1000 = 0.050 L
what is the specific heat of water?
4.18 J/g*C
what is an isolated system?
what are some assumptions of an ideal gas?
gas molecules have no intermolecular forces, gas particles themselves take up no volume
what is the scientific notation for:
1. 4.3x10^05
2. 9.32 x 10^2
3. 3.32x10^5
The density of a solution of sugar water is 1.037 g/mL. You buy 1L of this solution. On the bottle, it says it is 10% sugar by mass. Approximately much sugar (grams) is in the solution?
1000 mL * 1.037 grams/ mL = 1,037 grams solution
10% is sugar: 1037 * 0.10 = 103.7 grams of sugar
Imagine you conduct a reaction in a beaker. You put a thermometer in the beaker to monitor the temperature of the reaction. The final temperature is lower than the initial temperature of the reaction. Is the reaction endothermic or exothermic?
endothermic: takes heat energy from surroundings, which we measure.
temperature is ____ during phase changes (ie. gas --> liquid)
constant
what is the difference between standard conditions and standard temperature and pressure (STP)
standard conditions: 25 C (298K), 1 atm, 1M concentrations
STP: OC (273 K), 1 atm