It's just a phase . . .
#2
(2) It retains its original volume, but its shape changes (because liquids have definite volume, but take the shape of their container).
#13
(1) 50°C
#8
(4) joule
#1
(4) no definite shape and no definite volume
#12
(3) This assumes you drop the sand and salt mixture into water, the salt dissolves, you filter out the sand, then evaporate away the water!
#6
(2) Fusion
Answer #10 AND say what is also happening to the Potential Energy.
(2) The potential energy is constant (while the kinetic energy increases).
#5
(1) increases (because the definition of temperature is average kinetic energy).
A sample of gas has a volume of 12 L at STP. What will be the new volume when the pressure is double at constant temperature?
(1atm)(12L)=(2atm)(x)
6.0L
Two liquids like oil and water do not mix and can be separated using a separatory funnel. What is the word for this?
immiscible
Answer #4 and also say specifically what kind of motion is exhibited by molecules in the solid phase.
(3), VIBRATION only
#17
(1) This is a cooling curve.
#18
Heat flows from the sphere to the surrounding water.
In paper chromatography using water, where will a nonpolar ingredient end up?
It will not move with water, which is polar; it will stay at it's original dot.
Which three phase changes are exothermic (using the specific names of the phase changes)?
freezing, condensation, and deposition
#29, Describe what is happening to BOTH kinetic and potential energies during this time.
Kinetic energy is constant. Potential energy is DECREASING.
#24 Show the correct numerical setup and the answer.
q=mHf
q=(200. g)(334J/g)
= 66,800 J
Answer #16 AND say whose law this describes.
(1) Avogadro's Law
methanol poisoning.
Answer #14 AND say the name of the phase change AND whether this is endothermic or exothermic.
(2) This is condensation, which is exothermic. That is why the surrounding temperature increases, because the phase change releases heat.
Looking at Figure 4-2 on page 59, WHY is line segment DE longer than line segment BC?
The heat of vaporization for a substance (Hv) is always greater than the heat of fusion (Hf).
#19 Show the numerical setup and the answer.
q = (100.g)(4.18)(2.1°C)
q = 880 J
#27 Show numerical setup and answer.
(75kPa)/(295K) = x/(418K)
x = 106 = 110kPa
The description must explain that the mixture is heated and that substances will separate by boiling point, one substance boiling off first and being condensed and collected in another container.