Ch 6 (enthalpy?)

Question 1

What is solvent and what is solute?

Answer 1

A solute is the substance to be dissolved

The solvent is the one doing the dissolving

Question 2

How do you convert celsius to kelvin?

Answer 2

Add 273

Question 3

standard enthalpy (finding △H°F) “calculate the enthalpy changes”

Answer 3

(products - reactants)
1- write out eq
2- substitute the chem names for the numbers given
* make sure you separate coefficients

Question 4

finding energy equation

Answer 4

Q = m x cp x △T
q= energy (j)
m= mass (g)
cp= specific heat (j/g x °C)
△T = change in temp

Question 5

finding molar heat capacity

Answer 5

q = n x △T x c
n = moles
c = molar heat capacity
*you must do ( # of mol / molar mass ) to find n

Question 6

△H = negative means..?

Answer 6

heat is being released

Question 7

△H = positive means..?

Answer 7

heat is being absorbed

Question 8

How to find how much heat is being absorbed/released

Answer 8

given x ( 1 mol / molar mass ) x (△H KJ / # of mol in eq) = kj