Can someone answer these 2 science questions?

Question

Question 1: How does the pressure of a gas (in a closed container) change when it is heated?

Question 2: John is heating some soup. Explain why the smell of soup gets stronger, as the liquid warms up.

Thanks in advance!

Answer 1

Q1. The pressure depends on temperature

in the ideal gas case pV/T=constant i.e. if temperature is higher the pressure must be lower

Q2. higher temperature means higher evaporation of soup

Answer 2

Q1: Pressure of a gas in a closed container increases when it is heated up as gas particles gain more kinetic energy due to the heat energy gained. The gas particles move more quickly and collide with the sides of the closed container more frequently i.e. increasing pressure in the closed container.

Q2: Some soup particles evaporate due to the heat and as it slowly heats up, more of the soup evaporates i.e. stronger smell.

Hope u have a clearer picture ;)

Answer 3

1))  

when the gas is heated the molecules move with a higher velocity which results higher pressure on the walls

2))

as the soup is heated due to increase in kinetic energy mnore number of liquid molecules containing soup escape resulting in the strong odour

Answer 4

1) Boyle's Law states that PV=nRT.  That is, pressure times volume is equal to number of moles of the substance times a constant, R, times the temperature.  Solving for P = nrt/V.

2)  Assuming the saucepan is not covered, some of the soup is converted to gas as the mixture expands.  It "wafts" around the room for you to smell!