Topic: Which conditions cause water to become less dence in a gas phase? (Read 4067 times)

jylxox · « **on:** October 23, 2009, 08:51:02 PM »

Which of the following conditions would cause water in the gas phase to become less dense ? More than one may be true.
a) Increasing the pressure while keeping the temperature and the number of moles constant.
b) Increasing the temperature while keeping the pressure and the number of moles constant.
c) Reducing the number of molecules while keeping the volume and the temperature constant.
d) Decreasing the ratio of pressure to temperature while keeping the number of moles constant.

Borek · « **Reply #1 on:** October 24, 2009, 05:19:28 AM »

Please read forum rules.

You have to show your attempts to receive help. This is a forum policy.

jylxox · « **Reply #2 on:** October 24, 2009, 01:04:09 PM »

I'm very sorry for violating those rules .

Here's what I think the answers are
b) Increasing the temperature while keeping the pressure and the number of moles constant.
c) Reducing the number of molecules while keeping the volume and the temperature constant.
d) Decreasing the ratio of pressure to temperature while keeping the number of moles constant.

I'm just not sure about A.

BigDeepers · « **Reply #3 on:** October 24, 2009, 04:07:05 PM »

PV = NRT

As pressure goes up while temperature remains and moles remain constant, volume goes DOWN.

Density = mass / volume

As volume decreases while mass remains constant, Density increases.

Therefore the gas will become more dense.

A is incorrect.

Topic: Which conditions cause water to become less dence in a gas phase? (Read 4067 times)

jylxox

Which conditions cause water to become less dence in a gas phase?

Borek

Re: Which conditions cause water to become less dence in a gas phase?

jylxox

Re: Which conditions cause water to become less dence in a gas phase?

BigDeepers

Re: Which conditions cause water to become less dence in a gas phase?

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