*This is a Chemical Engineering question, that just inst a category choice**
A 831.0 g/hr stream of liquid methyl alcohol, also called methanol, (CH3OH) at 5.80 atm and 18.0°C was held at constant pressure, vaporized and brought to 236.0°C. Assume that methyl alcohol vapor behaves ideally for the temperature range and pressure given. FIND: The rate heat must be supplied to this system, Because this is an open system and there is no change in kinetic energy, potential energy, or shaft work, the rate of heat supplied to the system is equal to the rate of change in enthalpy of the process.
The change in enthalpy is a state property, meaning that it is path independent. Since table values for the specific enthalpy of methyl alcohol at the starting and final conditions are not available, you will have to calculate the change in enthalpy as the sum of a series of steps. Because the methyl alcohol is going from a liquid to a vapor, you know that you will need to utilize the heat of vaporization at some temperature, and the heat capacity equations of the liquid, the vapor, or both. You will also need the molar mass of methyl alcohol and its specific gravity. Choose the path that will allow you to calculate the total enthalpy change given these physical constants. Calculate the sum of each step\'s specific enthalpy, and multiply this value by the molar flow rate of methyl alcohol into the process.
STRATEGY: 1. Look up the relevant physical constants of methanol. 2. Determine the proper path to take. 3. Find ?H1. 4. Find ?H2. 5. Find ?H3. 6. Find ?Htot. 7. Find ?H. 8. Find Q.
Question 9 of 16 Map Sapling Learning 331.0 g/hr stream of liquid methyl alcohol, also called methanol, (CH3oH) at 5.80 atm and 18.0°C was held at constant pressure, vaporized and brought to 236.0°C. Assume that methyl alcohol vapor behaves ideally for the temperature range and pressure given. FIND: The rate heat must be supplied to this system, Because this is an open system and there is no change in kinetic energy, potential energy, or shaft work, the rate of heat supplied to the system is equal to the rate of change in enthalpy of the process. The change in enthalpy is a state property, meaning that it is path independent. Since table values for the specific enthalpy of methyl alcohol at the starting and final conditions are not available, you will have to calculate the change in enthalpy as the sum of a series of steps. Because the methyl alcohol is going from a liquid to a vapor, you know that you will need to utilize the heat of vaporization at some temperature, and the heat capacity equations of the liquid, the vapor, or both. You will also need the molar mass of methyl alcohol and its specific gravity. Choose the path that will allow you to calculate the total enthalpy change given these physical constants. Calculate the sum of each steps specific enthalpy, and multiply this value by the molar flow rate of methyl alcohol into the process. STRATEGY: 1. Look up the relevant physical constants of methanol. 2. Determine the proper path to take. 4. Find ANd2 5. Find NH 6. Find ANHtot. 7. Find NH. 8. Find d.
