States of Matter
What are 3 examples of things that are not in the study of matter?
Feelings, light, and thoughts.
A gas occupies 500 mL at 2.0 atm. What will its volume be if the pressure changes to 4.0 atm?:
2.0 atm
A ball is dropped from a height. What happens to its gravitational potential energy as it falls?
It decreases and is converted into kinetic energy.
What does it mean when a reaction has reached equilibrium?
When the forward and reverse reactions are equal
When acid and base solutions react, they produce water and a compound called a salt. What reaction is this?
Neutralization
Does matter expand or contract when heated?
Matter expands when it is heated.
A gas has a volume of 3.0 L at 300K. What will its volume be at 450K?
4.5L
Is melting ice exothermic or endothermic?
Endothermic
What does increasing the temperature of an exothermic reaction result in?
more reactants
What is a titration?
A Titration is when a solution of unknown concentration is reacted with a solution of known concentration.
In the equation below, what substance is represented by C₆H₁₂O₆?
6CO2+6H2O→C6H12O6+6O2
The substance being represented by C8H12O6 is glucose
A gas has a pressure of 100 kPa at 250 K. What will its pressure be at 500 K?
200 kPa
What energy occurs in a toaster?
thermal energy
What is the favored in H2+I2->2HI if iodine is 30?
Products are favored
What is the base in the following equation: HCl + NH₃ → NH₄⁺ + Cl⁻.
NH3
If a student sprays perfume on in a class, how do the gas particles
React for it to spread?
Gas particles move faster because of the higher temperatures, that's how it spreads through the class
A sealed gas container has a pressure of 100 kPa at 250 K. What will the pressure be at 500 K?
200kPa
How much heat is needed to raise the temperature of 100 g of water by 10∘C10∘C? (C=4.18)
q=mc/Delta T= 4180(J)
What is the conventional equilibrium constant expression?
2SO3(g) ->2SO2(g) + O2(g)
What is the base in the following equation: HCl + NH₃ → NH₄⁺ + Cl⁻.
10.41
Liquid A has only dispersion forces
Liquid B has dipole-dipole forces
Liquid C has hydrogen bonding
Which liquid would most likely have the highest boiling point, and why?
The liquid that has hydrogen bonding, which is Liquid C, would have the highest boiling point because hydrogen bonding is the strongest type of intermolecular force.
A gas occupies 2.0 L at 1.0 atm and 300 K. What volume will it occupy at 2.0 atm and 600 K?
Molar volume conversions (1 mol = 22.4 L)
2.0L
How much energy is needed to melt 50 g of ice? (Delta H_f=334)
(q=m/Delta H_f=16,700(J)
Write the expression of the equilibrium constant Ca(OH)2+ 2H+ 2H2O + Ca2+
K=[Ca²+]/[H+]²
Write the equation for the dissociation of sodium hydroxide.
NaOH(aq) -> Na1+(aq) + OH1- (aq)