Describe what happens to a co2 sample when the following changes are made: (a) The temperature is increased from -100°c to 0°c at constant pressure of 2 atm
B) The pressure is reduced from 72 atm to 5.0 atm at a constant temperature of 30°c
C) The pressure is first increased from 3.5atm to 76atm at -10°c , and the temperature is then increased from -10°c to 45°c
D) 1.10 g of an unknown compound reduces the free
I'm sure someone could help if we just knew what you wanted? "What happens" paints with such a broad brush. It could be color, volume, temperature, delta S, delta H, delta G, and so on into the night. Give us a hint what you are looking for.
To describe what happens to a CO2 sample in each of these scenarios, we need to consider the relationship between temperature, pressure, and the physical properties of gases, specifically the ideal gas law.
The ideal gas law states that the pressure (P) of a gas is directly proportional to its temperature (T) in Kelvin (K) and its quantity or number of moles (n), while inversely proportional to its volume (V). It can be mathematically represented as:
PV = nRT
Where R is the ideal gas constant.
Now, let's analyze each scenario one by one:
a) The temperature is increased from -100°C to 0°C at constant pressure of 2 atm.
Since the pressure is constant, according to the ideal gas law, as the temperature increases, the volume of the CO2 sample also increases. This means that the gas expands due to increased molecular motion. Keep in mind this assumes that there are no phase changes (like melting or boiling) occurring as the temperature rises.
b) The pressure is reduced from 72 atm to 5.0 atm at a constant temperature of 30°C.
Again, assuming no phase changes occur, if the temperature remains constant, reducing the pressure causes the volume of the CO2 sample to increase. As we decrease the pressure, the gas molecules have more space to move around and occupy a larger volume.
c) The pressure is first increased from 3.5 atm to 76 atm at -10°C, and then the temperature is increased from -10°C to 45°C.
In this case, the pressure is first increased while keeping the temperature constant. This causes the volume of the sample to decrease, as per the ideal gas law. Then, when the temperature is increased from -10°C to 45°C, at the higher temperature and increased pressure, the volume of the CO2 sample will increase. The specific behavior of the gas will depend on the precise values of pressure, temperature, and volume involved.
d) 1.10 g of an unknown compound reduces the free...
The provided information seems to be incomplete in scenario D. If you can provide more context or specify what "the free" refers to, I would be happy to assist you.