Density
What is density?
Measure of how much mass is packed into a specific space/volume
What is kinetic energy?
The energy of something in motion
What section of the heating curve on the board is a liquid?
C
What does heat of fusion mean?
The energy required to melt one gram of a substance at its melting point
What is the definition of specific heat?
Specific heat (c) is the energy (in Joules) needed to raise 1 g of a substance by 1°C
What is the formula for density?
D=m/v
What is potential energy?
stored energy
What sections of the heating curve on the board is kinetic energy increasing?
A,C,E
What does heat of vaporization mean?
The energy required to boil one gram of a substance at it boiling point
What is the formula for specific heat?
Q=mcΔT
The density of a marble with a mass of 5 grams and a volume of 2 cm³
2.5 g/cm^3
What is temperature?
The average kinetic energy of the atoms or molecules that make up a substance
What section of the heating curve on the board will you find substances with no definite shape or volume?
E
The heat of vaporization of water is 2257 Joules/gram. What energy in Joules is required to convert 50 grams of water into steam?
112850 J
Does water have a high or a low specific heat? What is the specific heat of water?
High specific heat
4.18
Find the density that 35.2 g of carbon tetrachloride (CCl4) will occupy if it has a volume of 1.60 mL.
22 ml
What is an endothermic reaction?
A chemical process that absorbs heat/energy from its surroundings
What sections of the heating curve is potential energy increasing?
B,D
If 2083 Joules are used to melt 5.26 grams of aluminum, what is the heat of fusion of aluminum?
396.01 J/g
A 805.6 g sample of hydrogen sulfide is subjected to a temperature change of +778.28 °C while absorbing 636390 joules of heat. What is the specific heat capacity of hydrogen sulfide?
1.015 J/gC
Mercury metal is poured into a graduated cylinder that holds exactly 22.5 mL. The mercury used to fill the cylinder weighs 306.0 g. From this information, calculate the density of mercury.
13.6 g/ml
List 4 examples of an exothermic reaction?
some examples:
Combustion (burning)
Freezing
Condensation
Cellular respiration
What section of the heating curve on the board represents the heat of fusion? What section represents the heat of vaporization?
heat of fusion=b
heat of vaporization=d
If the same amount (5.26 g) of zinc is melted, it takes 579 Joules to completely melt the sample. What is the heat of fusion of zinc?
110.08 J/g
A 510.7 g sample of copper is subjected to a temperature change of -553.77 °C. The specific heat capacity of copper is 0.385 J/(g∙°C). How many joules of heat were transferred by the sample?
-108881.98 J