Feeling Gassy
Boyle learned that at constant temperature and number of molecules, the pressure of a gas is inversely proportional to its
volume
What is a substance that conducts heat well, is hard, and is malleable?
metal
Where is it a solid?
A
If the decomposition of 1.00 mole of sodium hydroxide (molar mass of 40.0g/mol) absorbs 60.0 kJ of energy, how much energy would be absorbed by the decomposition of 20.0 g of the substance?
30.0kJ
anything that has been used, left, removed, altered, or contaminated during the commission of a crime.
evidence
According to Charles’s law, at constant pressure and number of molecules volume is directly proportional to
temperature
What type of bond that forms from the transfer of electrons?
ionic
Where is it a liquid?
D
List one thing that determines the temperature increase in a substance.
specific heat of the substance and mass of the substance
study of criminal activity
criminology
A liquid _____when its vapor pressure is equal to the pressure above its surface.
boils
Give a general physical property of covalent compounds.
low melting point
Where is it melting?
C
List one assumption(s) must be made when using a calorimeter.
no heat is gained or lost to the surroundings, the calorimeter itself does not gain or lose heat, all of the heat lost by the metal is gained by the water
“to see with one's own eyes”
autopsy
Above the critical pressure, only the ____ phase of a pure substance can exist.
gas
Give an example of a pair of atoms that will form a covalent bond.
N, O
Where is it freezing? Boiling?
B, E
A 21.5g piece of iron at 100.0°C was dropped into a calorimeter with 132 g of water at 20.0°C. What is the final temperature of the system?
a. 3.2°C b. 21.4°C c. 85.4°C d. 102°C
b. 21.4°C
study of poisons and drugs
toxicology
The gas, liquid, and solid phases can all coexist at the _____ point.
triple
Which metallic property is explained by the interaction of delocalized electrons with light?
luster
If the substance went straight from A to G, what would we call that phase change?
sublimation
A scoop of ice cream has an energy value of 775,000 joules. What is this value in Calories? (Note 1 cal = 4.184 J and 1000 cal = 1 Cal)
a. 775000 Cal b. 1852294 Cal c. 7750 Cal d. 185 Cal
185 Cal
material deposited at a crime scene that can only be detected through a deliberate processing procedure
trace evidence