Moderators: Chem_Mod, Chem_Admin

Nahelly Alfaro-2C
Posts: 59
Joined: Wed Nov 15, 2017 3:04 am


Postby Nahelly Alfaro-2C » Sun Feb 17, 2019 5:21 pm

Why does the magnitude in the change in entropy depend on temperature when heat is transferred?

Posts: 65
Joined: Fri Sep 28, 2018 12:28 am

Re: Enthalpy

Postby WilliamNguyen_4L » Sun Feb 17, 2019 5:26 pm

Entropy=enthalpy/temperature so since temperature is in the denominator the higher the temperature is the less entropy will be.

Julia Go 2L
Posts: 60
Joined: Sun Sep 30, 2018 12:17 am
Been upvoted: 1 time

Re: Enthalpy

Postby Julia Go 2L » Sun Feb 17, 2019 5:27 pm

Entropy is defined as ΔS=q/T. Based off the equation, the magnitude of change in entropy is greater when the value of T is lower. This is because temperature is in the denominator so the heat added to the system will have a greater effect on the change in entropy.

Thinking about it intuitively, this makes sense because adding heat to a system increases the system's total energy. This gives more kinetic energy to the particles in the system. Thus, increasing the entropy of the system. So, if the system starts at a lower temperature, adding heat will have a larger effect on ΔS.

Posts: 32
Joined: Fri Sep 28, 2018 12:16 am

Re: Enthalpy

Postby 105169446 » Sun Feb 17, 2019 10:21 pm

Delta S=q/T so since temperature is the denominator, if you make T bigger, delta S will be smaller and vice versa, if you make T smaller, delta S will be bigger. That explains why the change in entropy is larger when the temperature is lower.

Lumbini Chandrasekera 1B
Posts: 63
Joined: Fri Sep 28, 2018 12:18 am

Re: Enthalpy

Postby Lumbini Chandrasekera 1B » Sun Feb 17, 2019 11:00 pm

High temperature is associated with lower entropy and vice versa.

Return to “Concepts & Calculations Using Second Law of Thermodynamics”

Who is online

Users browsing this forum: No registered users and 1 guest