Skip to main content
Ch.18 - Thermodynamics: Entropy, Free Energy & Equilibrium
McMurry - Chemistry 8th Edition
McMurry8th EditionChemistryISBN: 9781292336145Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoMcMurry 8th EditionCh.18 - Thermodynamics: Entropy, Free Energy & EquilibriumProblema 57b
Capitolo 18, Problema 57b

Which state in each of the following pairs has the higher entropy per mole of substance? (b) N2 at STP or N2 at 0 °C and 10 atm

Guida verificata passo dopo passo
1
Entropy is a measure of the disorder or randomness in a system. In general, gases have higher entropy than liquids, and liquids have higher entropy than solids.
For gases, entropy increases with an increase in volume or a decrease in pressure, as the molecules have more space to move around.
STP (Standard Temperature and Pressure) is defined as 0 °C and 1 atm.
Compare the two conditions: N_2 at STP (0 °C, 1 atm) and N_2 at 0 °C and 10 atm.
Since the temperature is the same in both cases, focus on the pressure: lower pressure (1 atm) at STP means higher volume and thus higher entropy compared to 10 atm.

Risposta video verificata per un problema simile:

Questa soluzione video è stata consigliata dai nostri tutor come utile per risolvere questo problema.
Durata del video:
3m

Concetti chiave

Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.

Entropy

Entropy is a measure of the disorder or randomness in a system. It quantifies the number of microscopic configurations that correspond to a thermodynamic system's macroscopic state. Higher entropy indicates greater disorder and more available microstates, which typically occurs in gases compared to liquids and solids.
Video consigliato:
Percorso guidato
02:46
Entropy in Thermodynamics

Ideal Gas Law

The Ideal Gas Law relates the pressure, volume, temperature, and number of moles of an ideal gas through the equation PV = nRT. This law helps predict how gases behave under different conditions, including changes in temperature and pressure, which directly affect the entropy of the gas.
Video consigliato:
Percorso guidato
01:15
Ideal Gas Law Formula

Standard Temperature and Pressure (STP)

Standard Temperature and Pressure (STP) is defined as a temperature of 0 °C (273.15 K) and a pressure of 1 atm. At STP, gases behave ideally, and their properties, including entropy, can be compared more easily. Deviations from STP, such as increased pressure or decreased temperature, can significantly alter a gas's entropy.
Video consigliato:
Percorso guidato
01:08
Standard Temperature and Pressure
Pratica correlata
Domanda del libro di testo

Which state in each of the following pairs has the higher entropy per mole of substance? (d) CO2 at STP or CO2 at 100 °C and 0.1 atm

620
views
1
rank
Domanda del libro di testo

Which state in each of the following pairs has the higher entropy per mole of substance? (a) Ice at -40 °C or ice at 0 °C

336
views
Domanda del libro di testo
Make a rough, qualitative plot of the standard molar entropy versus temperature for methane from 0 K to 298 K. Incorporate the following data into your plot: mp = -182 °C; bp = -164 °C; °S = 186.2 J/(K*mol) at 25 °C.
465
views
Domanda del libro di testo
What is the entropy change when the volume of 1.6 g of O2 increases from 2.5 L to 3.5 L at a constant temperature of 75 °C? Assume that O2 behaves as an ideal gas.
495
views
Domanda del libro di testo

Which state in each of the following pairs has the higher entropy per mole of substance? (a) H2 at 25 °C in a volume of 10 L or H2 at 25 °C in a volume of 50 L

455
views
Domanda del libro di testo

Which state in each of the following pairs has the higher entropy per mole of substance? (d) Water vapor at 150 °C and 1 atm or water vapor at 100 °C and 2 atm

402
views