CHEM 1411 – General Chemistry I – Useful Formulas and Constants for the Final

Flashcards of formulas and constants for the final exam.

What is the formula to convert Celsius to Fahrenheit?

°𝐹 = 1.8 × °𝐶 + 32

What is the formula to convert Fahrenheit to Celsius?

°𝐶 = °𝐹 − 32 / 1.8

What is the formula to convert Celsius to Kelvin?

𝐾 = °𝐶 + 273.15

What is the equation relating Energy and frequency?

𝐸 = ℎ𝑣

What is the relationship between frequency, speed of light, and wavelength?

𝑣 = 𝐶 / 𝜆

What is the formula relating Energy, Planck's constant, and wavelength?

𝐸 = (ℎ) 𝐶 / 𝜆

What is the formula for Boyle's Law?

𝑃₁𝑉₁ = 𝑃₂𝑉₂

What is the formula for Charles's Law?

𝑉₁ / 𝑇₁ = 𝑉₂ / 𝑇₂

What is the formula relating volume and number of moles?

𝑉₁ / 𝑛₁ = 𝑉₂ / 𝑛₂

What is the Combined Gas Law formula?

𝑃₁𝑉₁ / 𝑇₁ = 𝑃₂𝑉₂ / 𝑇₂

What is the Ideal Gas Law formula?

𝑃𝑉 = 𝑛𝑅𝑇

What is the formula to calculate density using molar mass?

𝐷 = 𝑀𝑃𝑃 / 𝑅𝑇

What is Avogadro's number?

6.02 × 10²³

What is the formula for Graham's Law of Effusion?

𝑟₁ / 𝑟₂ = √(𝑀₂ / 𝑀₂)

What is the formula for work?

𝑤 = −𝑃∆𝑉

What is the formula for Enthalpy?

𝐻 = 𝐸 + 𝑃𝑉

What is the formula for change in internal energy?

∆𝐸 = 𝑞 + 𝑤

What is the formula for change in enthalpy?

∆𝐻 = ∆𝐸 + 𝑃∆𝑉

How is heat calculated?

𝑄 = 𝑚 × 𝐶 × ∆𝑇

What is the formula for standard enthalpy of reaction?

∆𝐻𝑟𝑥𝑛0 = Σ𝑛∆𝐻𝑓0(𝑝𝑟𝑜𝑑𝑢𝑐𝑡𝑠) −Σ𝑚∆𝐻𝑓0(𝑟𝑒𝑎𝑐𝑡𝑎𝑛𝑡𝑠)