Chemistry: The Combined Gas Law

1. The pressure of a gas changes from 120 kPa to 50 kPa. The volume changes from 45
initial temperature is 81°C, what is the final temperature in °C?

2.) A sample of nitrogen goes from 21 m² to 14 m and its pressure increases from 100 kPa to 150 kPa. The
final temperature is 300 K What was the initial temperature in Kelvins?
sample of argon goes from 500 K to 350 K and its pressure changes from 280 kPa to 380 kPa. If th
tial volume is 18 dm3, what is the final volume?

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

imma come back to you hold on

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.