1. Mrs. Wilburn writes a note to Sadie's teacher explaining why Sadie was absent the past two days.

Author's Purpose:

Explain:

Predict whether the changes in enthalpy, entropy, and free energy will be positive or negative for the boiling of water, and explain your predictions. how does temperature affect the spontaneity of this process?

Convert the temperature of dry ice, –77 ∞c, into degrees fahrenheit and kelvin.

Using the periodic table, complete the following. element: hydrogen symbol: h₂ molecular weight: g mass of one mole: g/mol