# Basic Units + Gas Laws Flashcards

Equal values of

1 atmosphere

In Bar

1.01

1 atmosphere = ?PSI

14.69

1 atmosphere = ?kPa

100 (101.3)

1 atmosphere = ?mmHg

760

1 atmosphere = ?cm H2O

1020

1 atmosphere = ?Pascal

101, 325

How is SI unit for seconds standardised?

It is the duration for a certain number of oscillations of caesium-133 atom.

How are the SI units for meter standardised?

Length light travels in vacuum in 1/300000000 of a second.

How is mole standardised to?

Amount of substance that contains same number of particles as there are atoms in 0.012kg (12g) of carbon-12

Regarding derived and non-SI units:

1. Derived units must always be expressed as base units? T/F

- Velocity and speed have the same bad units? T/F

- False, can be expressed as base units or combination

2. True

What is the formula for kinetic energy?

1/2 mass x velocity squared

Force formula

Mass x Acceleration

Define pressure

Pressure is defined as the cumulative force generated, divided by the total area over which that force is applied.

What is Boyles Law?

At a constant temperature, the volume of a gas at a given mass will decrease if it’s pressure is increased.

Volume of a given mass of gas varies inversely with absolute pressure.

What is Charles Law?

At a constant pressure,

the volume of of a given mass varies with the absolute temperature.

Volume inversely proportional to Temp (Kelvin)

(Ie as temperature rises, gas moves more and hits sides of container therefore pressure would increase. To keep pressure constant volume of gas would have to increase to compensate.)

What is Gay-Lussacs Law?

At a constant volume, the absolute pressure of a given mass varies with absolute temperature.