equations

# equations - Common Equations Used in Chemistry m Equation...

This preview shows pages 1–3. Sign up to view the full content.

Common Equations Used in Chemistry Equation for density: d= m v Converting ˚F to ˚C: ˚C = (˚F - 32) x 5 9 Converting ˚C to ˚F: ˚F = ˚C x 9 5 + 32 Converting ˚C to K: K = (˚C + 273.15) Percent composition of an element = n x molar mass of element molar mass of compound x 100% - where n = the number of moles of the element in one mole of the compound % yield = actual yield theoretical yield x 100% molarity (M) = moles of solute liters of solution Dilution of Solution: M i V i = M f V f Boyle’s law - Constant T and n : PV = k Boyle’s law - For calculating changes in pressure or volume: P 1 V 1 = P 2 V 2 Charles’ law - Constant P and n : V T = k Charles’ law - For calculating temperature or volume changes: V 1 T 1 = V 2 T 2 Avogadro’s law - Constant P and T: V = k n Ideal Gas equation: PV = n RT Calculation of changes in pressure, temperature, or volume of gas when n is constant: P 1 V 1 T 1 = P 2 V 2 T 2

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Calculation of density or molar mass of gas: d = P M RT Dalton’s law of partial pressures - for calculating partial pressures: P i = X i P T Root-mean-square speed of gas molecules: u rms = ( 3RT M ) 0.5 Van der waals equation; for calculating the pressure of a nonideal gas: (P + a n 2 V 2 ) (V - n b) = n RT Definition of heat capacity, where s is specific heat: C = ms Calculation of heat change in terms of specific heat : q = ms t Calculation of heat change in terms of heat capacity: q = C t Electrical force: F el = k q 1 q 2 r 2 Potential energy: V = k q 1 q 2 r Calculation of standard enthalpy of reaction: rxn = n f (products) - m f (reactants) [where n and m are coefficients in equation]
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 11/16/2011 for the course CHM 2045 taught by Professor Mitchell during the Fall '07 term at University of Florida.

### Page1 / 6

equations - Common Equations Used in Chemistry m Equation...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online