class
mrs cassidys favorite color
orange
1 kilometer = how many meters?
1,000 meters
What are the standard units for bond energy?
kj/mol
What three essential components are required for a combustion reaction to occur?
Fuel, heat (ignition source), and oxygen.
A gas occupies 10.0 L at 1.0 atm and 273 K. What is the volume if the pressure increases to 2.0 atm and the temperature increases to 546 K?
10.0 L
how many juniors are in class
7
1000 mm
Is breaking a bond endothermic or exothermic?
Endothermic (requires energy).
When a hydrocarbon (like gasoline) undergoes complete combustion in an engine, what are the two main chemical products formed?
Carbon dioxide (CO2) and water (H2O)
A sample of gas has a volume of 5.0 L at 1500 mm Hg and 2000 K. If the volume increases to 25.0 L and the temperature drops to 1750 K, what is the new pressure?
262.5 mm Hg
how many sophmores
24
Convert 5.98 cm to millimeters
59.8 mm
Is forming a bond endothermic or exothermic?
Exothermic (releases energy).
Is combustion an exothermic or endothermic reaction
Exothermic
A gas at 120 kPa and 45.0 L is at 81°C (354 K). If the pressure drops to 50 kPa and the volume changes to 40.0 L, what is the final temperature in Kelvin?
about 131 K
how many seniors
1
Convert 65 cm to meters
0.65 meters
In a potential energy diagram, if the products have higher energy than the reactants, is the reaction endothermic or exothermic?
Endothermic.
What harmful gas is produced during incomplete combustion when there is not enough oxygen available?
carbon monoxide (CO)
At STP (1.0 atm, 273 K), a gas occupies 22.4 L. What will the volume be at 1.5 atm and 300 K?
16.4 L
tallest in class
jacob
How many mg are in 45.9 g
45,900 mg
What is the standard definition of bond energy?
It is the amount of energy required to break one mole of a specific chemical bond between two atoms in the gaseous state.
In the combustion of methane, how many molecules of oxygen are needed to react with one molecule of methane?
Two oxygen molecules.
A gas is at 1.09 atm and 28.4°C (301.55 K). If it is moved to a new state where the pressure is 1.23 atm, the temperature is 97.0°C (370.15 K), and the volume is 16.2 mL, what was the original volume?
14.9 mL.