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Assuming the gas follows the ideal gas law (which at these temperatures and pressures should be a good assumption),
T2/T1 = P2V2/P1V1
so
T2 (final temperature) = T1 x P2V2/P1V1
Temperature has to given in absolute temperature for this to work, so we first convert T1 25°C = 278.15 K.
T2 = (278.15 K)(47.3 kPa)(7.0 L)/(95.3 kPa)/(2 L) = ~386.55 K = ~113.40 °C
If it seems strange to you that the temperature went UP when the gas expanded, consider this...
If the temperature remained constant, then as the pressure dropped to 47.3 kPa, the volume would only increase to about 5 L. To make the volume increase to 7 L at that pressure you would have to heat the gas up get it to expand.
What else can I help you with?
What usually happens in general for a gas at a constant volume?
The gas volume become constant when the pressure is increased to a point that makes the distance between the gas molecules equal to zero at this point no more increase of temperature with pressure is observed. Or if the pressure and temperature are kept constant within a system then the volume can also be constant as long as you are able to maintain the pressure and temperature at constant level.
How does the volume of an ideal gas at constant temperature and pressure change as the number of molecules increases?
The volume of an ideal gas will increase as the number of molecules increases at constant temperature and pressure. This relationship is described by Avogadro's law, which states that the volume of a gas is directly proportional to the number of molecules present, assuming constant temperature and pressure.
What will happen in a sealed bottle when the air is heated and then allowed to cool?
As the air inside the sealed bottle is heated, it will expand and increase in pressure. When the air is allowed to cool, it will contract and decrease in pressure. This change in pressure can potentially cause the bottle to deform or even explode if the pressure builds up too much.
What are the two major characteristics that change when air is heated and cooled?
Since we are talking abut heating and cooling - we define those both as changing the temperature so that is one characteristic. Other characteristics depend on how the heating and cooling occur. If the pressure remains the same, air will expand on heating and contract on cooling. If the volume is held constant, the pressure will increase with heating and decrease with cooling. The internal energy depends on what you do with pressure, work and heat. You can actually get a warmer gas with less internal energy and a cooler gas with more internal energy.
What happens to a gas's mass when it is heated?
The atoms in the mass become more energetic and create more pressure. If the bounds of the container allows it, such as in a balloon, the gas will expand. If the bounds doe not allow it, such as in a fixed container, the pressure will increase.
What happens to the pressure of gas when it is heated at a constant heat?
The pressure is higher.
What is a gas that expands when heated?
Any gas will expand when heated, assuming you keep pressure constant.
Why Do Gasses Have Two Specific Heats?
One is for constant pressure, the other is for constant volume. These are not the same; for example, if the pressure is maintained constant, and the gas is heated, the volume changes.
What will happen to air if it is heated along a slope element?
Generally, if air is heated, its temperature will increase. And if the pressure remains constant, its density will decrease.
How much will the pressure increase for one cubic meter of air when heated by one degree c?
Assuming constant volume, the pressure of one cubic meter of air will increase by approximately 0.0365 atmospheres when heated by one degree Celsius. This value is derived from the ideal gas law, where pressure is directly proportional to temperature for a constant volume of gas.
What usually happens in general for a gas at a constant volume?
The gas volume become constant when the pressure is increased to a point that makes the distance between the gas molecules equal to zero at this point no more increase of temperature with pressure is observed. Or if the pressure and temperature are kept constant within a system then the volume can also be constant as long as you are able to maintain the pressure and temperature at constant level.
If a balloon is heated what happens to the pressure of an air inside the balloon if the volume remains constant?
If a balloon is heated, the temperature inside the balloon increases, causing the air molecules to move faster and collide more frequently with the walls of the balloon. This increase in collisions leads to an increase in pressure inside the balloon, assuming the volume remains constant according to the ideal gas law (P1/T1 = P2/T2).
Why does the heated air exert more than pressure than the unheated air?
It doesn't unless it is constrained in a constant volume container. When in a container, as the air is heated its molecules vibrate more and take up more volume - as the volume of the container is fixed then Charles's law applies and the pressure goes up.
Two cubic meters of a gas at 30 degrees Kelvin are heated at a constant pressure until the volume doubles. What is the final temperature of the gas?
60
When air is heated air pressure decreases because the molecules?
when air is heated ,air pressure decreases because the molecules are
How does the volume of an ideal gas at constant temperature and pressure change as the number of molecules increases?
The volume of an ideal gas will increase as the number of molecules increases at constant temperature and pressure. This relationship is described by Avogadro's law, which states that the volume of a gas is directly proportional to the number of molecules present, assuming constant temperature and pressure.
Why do gases expand in charles law?
the kinetic energy of constant pressure causes the gasses to expand. when they are heated, the molocules get bigger causing the gas to expand. if it gets hot enough, it will explode.
