Chemistry: Answer a Question - Ask a Question

[Sine]

The aim of this thread is to revise chemistry via practice questions which is one of the best ways to study.

The thread will be like a question chain where a user answers the question that has been posed above them and then asks a question in the same post for another user to answer.

I'll start with something simple

Question:
What are the standard laboratory conditions (SLC)?

[Ionic Doc]

Question:
What are the standard laboratory conditions (SLC)?

SLC has a temperature of 25 degrees and a pressure of 100kpa. The molar volume of gas at SLC is 24.8L/mol


Question:
This is sort of a tricky question and I have trouble understanding it but,
When Temperature decreases and Pressure is kept at a constant, why does volume decrease?

thnx

[sk2000]

SLC has a temperature of 25 degrees and a pressure of 101.3kpa. The molar volume of gas at SLC is 24.8L/mol


Question:
This is sort of a tricky question and I have trouble understanding it but,
When Temperature decreases and Pressure is kept at a constant, why does volume decrease?

thnx

When the temperature decreases, particles are moving slower due to a decrease in kinetic energy. This means that the particles will be colliding with the walls of the container less frequently, and with less force. The volume of the container will decrease as a result.

If that is still confusing, think of it the other way round. A higher temperature will mean that particles are moving faster, thus colliding with the walls of the container more frequently and with more force. The walls of the container will be forced to expand as a result, increasing the volume.

[Erutepa]

SLC has a temperature of 25 degrees and a pressure of 101.3kpa. The molar volume of gas at SLC is 24.8L/mol

SLC actually has a pressure of 100kpa (101.3 kpa is an aproximation of 1atm)

When the temperature decreases, particles are moving slower due to a decrease in kinetic energy. This means that the particles will be colliding with the walls of the container less frequently, and with less force. The volume of the container will decrease as a result.

If that is still confusing, think of it the other way round. A higher temperature will mean that particles are moving faster, thus colliding with the walls of the container more frequently and with more force. The walls of the container will be forced to expand as a result, increasing the volume.

You just beat me hehe

BTW you are supposed to ask a question after answering one, but I will ask one on this occasion haha

Distinguish between the solublity of Amylose and Amylopectin and explain any differences with reference to their structures