Moles of Gas and Gas Volumes Flashcards

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What is meant by the volume of a gas?

It is the space the gas takes up, usually measured in cubic decimetres (dm^3) or cubic centimetres (cm^3).

What does RTP stand for in gas calculations?

RTP stands for room temperature and pressure.

What are the typical conditions for RTP in school chemistry?

RTP is about 20 °C temperature and 1 atmosphere pressure.

What is the molar gas volume at RTP?

At RTP, 1 mole of any gas occupies 24 dm^3 of space.

Write the equation that links moles of gas and volume at RTP.

Moles of gas (mol) = volume of gas (dm^3) ÷ 24.

How do you calculate the volume of a gas at RTP if you know the moles?

Volume of gas (dm^3) = moles of gas (mol) × 24.

How many cubic centimetres (cm^3) are there in 1 dm^3 of gas?

There are 1000 cm^3 in 1 dm^3 of gas.

At RTP, how do the volumes of 1 mole of oxygen gas and 1 mole of helium gas compare?

They are the same; each has a volume of 24 dm^3 at RTP.

At RTP, what volume will 0.25 mol of a gas occupy?

Volume = 0.25 × 24 = 6.0 dm^3.

Why is molar gas volume useful in chemistry?

It lets us change between moles of gas and gas volume, so we can predict or measure how much gas is used or made in a reaction.