Skip to main content
Ch.5 - Gases
Tro - Chemistry: A Molecular Approach 4th Edition
Tro4th EditionChemistry: A Molecular ApproachISBN: 9780134112831Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoTro 4th EditionCh.5 - GasesProblema 55
Capitolo 5, Problema 55

What is the density (in g/L) of hydrogen gas at 20.0 °C and a pressure of 1655 psi?

Guida verificata passo dopo passo
1
Convert the pressure from psi to atm using the conversion factor: 1 atm = 14.696 psi.
Convert the temperature from Celsius to Kelvin by adding 273.15 to the Celsius temperature.
Use the ideal gas law equation, PV = nRT, to solve for the molar volume (V/n) of the gas. Here, P is the pressure in atm, V is the volume in liters, n is the number of moles, R is the ideal gas constant (0.0821 L·atm/mol·K), and T is the temperature in Kelvin.
Calculate the molar mass of hydrogen gas (H₂), which is approximately 2.02 g/mol.
Determine the density of the gas using the formula: density = (molar mass) / (molar volume).

Risposta video verificata per un problema simile:

Questa soluzione video è stata consigliata dai nostri tutor come utile per risolvere questo problema.

Concetti chiave

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

Ideal Gas Law

The Ideal Gas Law relates the pressure, volume, temperature, and number of moles of a gas through the equation PV = nRT. This law is essential for calculating the properties of gases under various conditions. In this case, it will help determine the density of hydrogen gas by rearranging the equation to find the mass per unit volume.
Video consigliato:
Percorso guidato
01:15
Ideal Gas Law Formula

Density Calculation

Density is defined as mass per unit volume (density = mass/volume). For gases, density can be expressed in grams per liter (g/L). Understanding how to calculate density using the Ideal Gas Law is crucial for solving the question, as it requires converting the conditions of the gas into a usable form for density determination.
Video consigliato:
Percorso guidato
01:56
Density Concepts

Unit Conversion

Unit conversion is the process of converting a quantity from one unit to another. In this question, pressure is given in psi, which must be converted to a compatible unit (such as atm or Pa) for use in the Ideal Gas Law. Mastery of unit conversions is vital for accurate calculations in chemistry, especially when dealing with different measurement systems.
Video consigliato:
Percorso guidato
01:56
Conversion Factors
Pratica correlata
Domanda del libro di testo

Use the molar volume of a gas at STP to calculate the density (in g/L) of nitrogen gas at STP.

3002
views
1
rank
Domanda del libro di testo

A sample of nitrogen gas in a 1.75-L container exerts a pressure of 1.35 atm at 25 °C. What is the pressure if the volume of the container is maintained constant and the temperature is raised to 355 °C?

1577
views
Domanda del libro di testo

A 248-mL gas sample has a mass of 0.433 g at a pressure of 745 mmHg and a temperature of 28 °C. What is the molar mass of the gas?

1245
views
1
rank
Domanda del libro di testo

A sample of N2O gas has a density of 2.85 g/L at 298 K. What is the pressure of the gas (in mmHg)?

2576
views
Domanda del libro di testo

A 113-mL gas sample has a mass of 0.171 g at a pressure of 721 mmHg and a temperature of 32 °C. What is the molar mass of the gas?

2104
views
1
rank
1
comments
Domanda del libro di testo

Use the molar volume of a gas at STP to determine the volume (in L) occupied by 33.6 g of neon at STP.

1923
views