Safety

How should you behave in lab?

Scientific MethodScientific Method

–what are the steps?what are the steps?

–Theory vs. Law vs. Theory vs. Law vs. hypothesishypothesis

States of Matter - shape States of Matter - shape and volume?and volume?

SolidSolid

LiquidLiquid

GasGas

KMT – what are the KMT – what are the parts?parts?

Physical changePhysical change–doesn’t change what it doesn’t change what it is, tearing, cutting, is, tearing, cutting, melting etc.melting etc.

Physical Properties – Physical Properties – what are they?what are they?–density, mass, volume, density, mass, volume, color, etc.color, etc.

DensityDensity

–How is it calculated?How is it calculated?

D = m/vD = m/v

A gold-colored ring has a mass of 18.9 A gold-colored ring has a mass of 18.9 grams and a volume of 1.12 mL. Is the grams and a volume of 1.12 mL. Is the ring pure gold? (The density of gold is ring pure gold? (The density of gold is 19.3 g/mL)19.3 g/mL)

An object has the following An object has the following measurements:measurements:– length: 6 cm length: 6 cm – width: 3 cmwidth: 3 cm– height: 1 cmheight: 1 cm– mass: 36 gmass: 36 g

– What is the volume?What is the volume?– What is the density?What is the density?

Law of Conservation Law of Conservation of Massof Mass

Scientific NotationScientific Notation– 800931 = ?800931 = ?

–0.00000397 = ?0.00000397 = ?

Sig. FigsSig. Figs–Rules for mult & divRules for mult & div

–Rules for addition & Rules for addition & subtractionsubtraction

Gas Laws – temp in Gas Laws – temp in KelvinKelvin–R: 8.31 for kPaR: 8.31 for kPa

0.0821 for atm0.0821 for atm

62.4 for mmHg62.4 for mmHg

Synthetic diamonds can be manufactured Synthetic diamonds can be manufactured at pressures of 6.00 x 10at pressures of 6.00 x 1044 atm. If we took atm. If we took 2.00 liters of gas at 1.00 atm and 2.00 liters of gas at 1.00 atm and compressed it to a pressure of 6.00 x 10compressed it to a pressure of 6.00 x 1044 atm, what would the volume of that gas atm, what would the volume of that gas be? be?

A man heats a balloon in the oven. If the A man heats a balloon in the oven. If the balloon initially has a volume of 0.4 liters balloon initially has a volume of 0.4 liters and a temperature of 20and a temperature of 20°C, what will the °C, what will the volume of the balloon be after he heats it volume of the balloon be after he heats it to a temperature of 250°C?to a temperature of 250°C?

A gas takes up a volume of 17 liters, has a A gas takes up a volume of 17 liters, has a pressure of 2.3 atm, and a temperature of pressure of 2.3 atm, and a temperature of 299 K. If I raise the temperature to 350 K 299 K. If I raise the temperature to 350 K and lower the pressure to 1.5 atm, what is and lower the pressure to 1.5 atm, what is the new volume of the gas?the new volume of the gas?

If I have an unknown quantity of gas at a If I have an unknown quantity of gas at a pressure of 1.2 atm, a volume of 31 liters, pressure of 1.2 atm, a volume of 31 liters, and a temperature of 87and a temperature of 87°C, how many °C, how many moles of gas do I have?moles of gas do I have?

ThermochemistryThermochemistry– q = mcq = mcΔΔTT– 1 Cal = 1000 cal1 Cal = 1000 cal– phase changesphase changes– Heat capacityHeat capacity– Heat – definitionHeat – definition– Specific heat – what is it? high vs. lowSpecific heat – what is it? high vs. low– Vapor?Vapor?– Calories to JoulesCalories to Joules