Pizza Rolls #5
Posted: Wed Feb 12, 2020 2:03 pm
Does anyone understand how to do parts A and B of number 5 on the midterm practice?
Created by Dr. Laurence Lavelle
https://lavelle.chem.ucla.edu/forum/
https://lavelle.chem.ucla.edu/forum/viewtopic.php?f=133&t=59291
Rachel Yu 1G wrote:For Part A, you have to add up three different delta S values to find the total change of entropy in the system. This includes deltaS for H2 container expansion, deltaS of Krypton gas for container expansion, and deltaS based on temperature change. Since entropy is a state function, this allows us to add these values to find the total entropy change.
For Part B, you can use PV=nRT by plugging in the given values in the prompt to find the final pressure.
Rachel Yu 1G wrote:For Part A, you have to add up three different delta S values to find the total change of entropy in the system. This includes deltaS for H2 container expansion, deltaS of Krypton gas for container expansion, and deltaS based on temperature change. Since entropy is a state function, this allows us to add these values to find the total entropy change.
For Part B, you can use PV=nRT by plugging in the given values in the prompt to find the final pressure.
005290099 wrote:Rachel Yu 1G wrote:For Part A, you have to add up three different delta S values to find the total change of entropy in the system. This includes deltaS for H2 container expansion, deltaS of Krypton gas for container expansion, and deltaS based on temperature change. Since entropy is a state function, this allows us to add these values to find the total entropy change.
For Part B, you can use PV=nRT by plugging in the given values in the prompt to find the final pressure.
But doesn't this only work for isothermal changes? Since there is a temperature change, how can we use the change in entropy for an isothermal expansion?