classmates
throwing things in class 24/7
pine
how many mililiters is in a liter?
1000
In chemistry, what is the universal rule regarding the energy change when a chemical bond is broken?
energy is always absorbed ( endothermic)
A combustion reaction is always which type of energy change?
exothermic
What does the 'V' stand for in the gas law equations?
volume
how many football players are in this class?
3
what is the equation to solve for moles?
6.022x10^23
which process is the result in releasing energy?
What is the specific component in a car engine that provides the 'spark' to start combustion?
spark plug
If a gas is at 100 degrees celsius , what is its temperature in Kelvin?
373K
football kicker
sawyer
How many inches are there in 10 meters?
393
If a chemical reaction is exothermic, what can be said about the bond energies?
The energy released forming products is greater than the energy used to break reactants
In an internal combustion engine, where does the 'combustion' actually take place?
inside the cylinder
What happens to the molecules of a gas when the temperature is increased?
They move faster
amount of boys and amount of girls in class
boys: 20, girls: 16
Which is greater: 45 miles or 63 km?
45 miles
If the enthalpy change (ΔH) of a reaction is positive, the reaction is
Endothermic
If you see a lot of black smoke from a fire, it usually means there is not enough:
oxygen
Which variable tells you how much space a gas takes up?
(V) volume
talks back
malaki
how many moles of co2 are in 1 gram?
0.0227 moles
In the molecule $H_2O$, how many $O-H$ bonds must be broken to completely separate the atoms?
2
What would happen to an engine if the 'Oil' was removed?
friction would cause the metal parts to rub together.
If you decrease the temperature of a gas while keeping the pressure the same, what happens to the volume?
it decreases