Substance A has a melting point of -10 degree celcius and a boiling point of 57 degree celcius. Sunstance B has a melting point of -67 degree celius and a boiling point of 15 degree celius. Room temperature is 20 degree celcius.
(A) What is the physical state of substance A at room temperature? At 0 degree celcius? At 100 degree celcius?
First, you need to note the correct spelling of celsius.
A mp -10 C, bp 57 C.
B mp -67 C, bp 15 C.
A is a solid below -10 C, melts at -10 and is a liquid between -10 and 57 C, boils at 57 C and becomes a vapor at 57 and above.
Same analysis for B.
I think you can figure it out from that information.
To determine the physical state of substance A at different temperatures, we need to compare the given temperatures with its melting point and boiling point.
At room temperature (20 degrees Celsius), since it is higher than the melting point of substance A (-10 degrees Celsius), substance A will be in the liquid state at room temperature.
At 0 degrees Celsius, substance A will be in the solid state because the temperature is below its melting point.
At 100 degrees Celsius, substance A will be in the gaseous state as the temperature is higher than its boiling point (57 degrees Celsius).
To determine the physical state of a substance at different temperatures, you need to compare the temperature with its melting and boiling points. Here's how you can determine the physical states of substance A at different temperatures:
1. At room temperature (20 degrees Celsius):
- Substance A's melting point is -10 degrees Celsius, which is lower than the room temperature. Therefore, substance A is expected to be in the liquid state at room temperature.
2. At 0 degrees Celsius:
- The temperature is lower than the melting point of substance A (-10 degrees Celsius). Consequently, substance A is expected to be in the solid state at 0 degrees Celsius.
3. At 100 degrees Celsius:
- The boiling point of substance A is 57 degrees Celsius, which is lower than 100 degrees Celsius. Therefore, substance A should be in the liquid state at 100 degrees Celsius.
In summary,
- At room temperature (20 degrees Celsius), substance A is in the liquid state.
- At 0 degrees Celsius, substance A is in the solid state.
- At 100 degrees Celsius, substance A is still in the liquid state.