Shown below is a rough sketch of the unary phase diagram (pressure vs. temperature) for carbon dioxide (CO2), dry ice. Note the diagram is not drawn to scale and contains breaks in the axes to signify this. Using the diagram, answer the following questions:
(a) Give the pressure (in atm) and temperature (in ∘C) values for the triple point of dry ice.
Pressure:
Temperature:
(c) Give the pressure (in atm) and temperature (in ∘C) values for the critical point of dry ice.
Pressure:
Temperature:
(d) Give the pressure (in atm) and temperature (in ∘C) values of the phase transformations observed under ambient pressure conditions.
Pressure:
Temperature:
a)5.11 -56.4
b)I
c)73 31.11
d)1 -78.5
second part of questions a and d are wrong
no they're right, stop putting others off. when i tried it, it came up as right.
Anonymous is right!
a)5.11 atm and -56.3
b) I
c) 73 atm and 31.1
d) 1 atm -78.5
To answer these questions, we need to locate and read the values from the unary phase diagram of carbon dioxide (CO2).
(a) The triple point of a substance refers to the specific pressure and temperature at which all three phases (solid, liquid, and gas) can coexist in equilibrium. To find these values on the diagram:
- Look for the point on the diagram where the solid, liquid, and gas regions meet. This is the triple point.
- Read the pressure and temperature values at that point.
(c) The critical point of a substance refers to the pressure and temperature at which the distinction between the gas and liquid phases disappears. To find these values on the diagram:
- Look for the point on the diagram where the gas-liquid boundary ends. This is the critical point.
- Read the pressure and temperature values at that point.
(d) Under ambient pressure conditions (usually around 1 atm), we can determine the phase transformations by examining the changes in state at different temperatures.
- Locate the ambient pressure value (1 atm) on the vertical axis (pressure) of the diagram.
- Follow the horizontal line from the point where the ambient pressure intersects with the diagram.
- Read the temperature at that intersection point to find the temperature of phase transformations.
Note: Interpretations from a rough sketch may not be as accurate as a precise, scaled diagram. However, we will try our best to estimate the values based on the sketch you provided.
Please provide the diagram or the pressure and temperature ranges on the diagram to assist you further.