Formulas For Exam 1

Question 1

What should the energy of the surroundings + the energy of the system equal?

Answer 1

0

Question 2

What is the formula for heat?

Answer 2

q=mc^T

Question 3

What is the formula for finding enthalpy if you know: ^energy, pressure, and ^Volume

Answer 3

^H= ^E + P^V

Question 4

What is the Gibbs equation?

Answer 4

^G= ^H - T^S

Question 5

If you know what the G value is for both the reactants and the products, then what equation can you use?

Answer 5

^G = n[products] - n[reactants]

Question 6

By rearranging the Gibbs equation, how can you find temperature?

Answer 6

T= ^H/^S

Question 7

By rearranging the Gibbs equation, how can you solve for ^S?

Answer 7

^S = ^H/T

Question 8

What are the units for Molarity?

Answer 8

Mol/L

Question 9

What are the units for Molality?

Answer 9

Mol solute/Kg solvent

Question 10

What is the equation for weight percent?

Answer 10

Grams solute/grams solvent • 100%

Question 11

What is the equation for Mole Fraction?

Answer 11

Mole solute/mole solution

Question 12

What is the equation for finding pets per million?

Answer 12

Grams solute/grams solution • 10^6

Question 13

What is the equation for Normality?

Answer 13

Equivalents solute/Liters solution

Question 14

What is the formula for finding the Vapor Pressure of a solution?

Answer 14

X•P

X=mole fraction of solvent OR solute
P=pressure of the pure solvent OR solute

Question 15

What is the formula for finding the Freezing Point of a solution?

Answer 15

^T= K•m

K= constant for the solvent (will be given)
m= Molality