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Ch.8 Gases
Timberlake - Chemistry: An Introduction to General, Organic, and Biological Chemistry 14th Edition
Timberlake14th EditionChemistry: An Introduction to General, Organic, and Biological ChemistryISBN: 9781292472249당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Timberlake 14th EditionCh.8 Gases문제 78a
8장, 문제 78a

A mixture of nitrogen (N2) and helium has a volume of 365 mL at 30 °C and a total pressure of 745 mmHg. (8.5, 8.6, 8.7)
a. If the partial pressure of helium is 65 mmHg, what is the partial pressure of the nitrogen?

검증된 단계별 안내
1
Step 1: Understand Dalton's Law of Partial Pressures, which states that the total pressure of a gas mixture is the sum of the partial pressures of each individual gas. Mathematically, this can be expressed as: Ptotal = PHe + PN2, where Ptotal is the total pressure, PHe is the partial pressure of helium, and PN2 is the partial pressure of nitrogen.
Step 2: Identify the given values from the problem. The total pressure of the gas mixture is 745 mmHg, and the partial pressure of helium is 65 mmHg.
Step 3: Rearrange Dalton's Law equation to solve for the partial pressure of nitrogen: PN2 = Ptotal - PHe.
Step 4: Substitute the known values into the equation: PN2 = 745 - 65 mmHg.
Step 5: Perform the subtraction to find the partial pressure of nitrogen. This will give you the value of PN2.

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주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Dalton's Law of Partial Pressures

Dalton's Law states that in a mixture of gases, the total pressure exerted is equal to the sum of the partial pressures of each individual gas. This principle is crucial for solving problems involving gas mixtures, as it allows us to isolate the contribution of each gas to the overall pressure.
추천 영상:
가이드 코스
01:02
Dalton's Law: Partial Pressure (Simplified) Concept 3

Partial Pressure

Partial pressure refers to the pressure that a single gas in a mixture would exert if it occupied the entire volume alone at the same temperature. Understanding partial pressures is essential for calculating the individual contributions of gases in a mixture, particularly when using Dalton's Law.
추천 영상:
가이드 코스
00:48
Dalton's Law: Partial Pressure (Simplified) Concept 2

Ideal Gas Law

The Ideal Gas Law (PV=nRT) relates the pressure, volume, temperature, and number of moles of a gas. While not directly needed for this specific question, it provides a foundational understanding of gas behavior and can be useful in broader contexts involving gas calculations.
추천 영상:
가이드 코스
01:15
The Ideal Gas Law Concept 1
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