2) Two bottles at the same temperature contain the same kind of gas. Bottle B has twice the volume and half the mass of gas as Bottle A. How does the pressure in B compare with the pressure in A? A) PB = % PA В) Рв 3 2 РА C) PB = 4 PA D) PB = 4 PA E) PB = PA

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### Gas Pressure Comparison

**Problem Statement:**

Two bottles at the same temperature contain the same kind of gas. Bottle B has twice the volume and half the mass of gas as Bottle A. How does the pressure in Bottle B (PB) compare with the pressure in Bottle A (PA)?

**Options:**

A) \( P_B = \frac{1}{2} P_A \)

B) \( P_B = 2 P_A \)

C) \( P_B = \frac{1}{4} P_A \)

D) \( P_B = 4 P_A \)

E) \( P_B = P_A \)

**Explanation:**

To solve this, we can use the Ideal Gas Law, which states:

\[
PV = nRT
\]

where \( P \) is the pressure, \( V \) is the volume, \( n \) is the number of moles, \( R \) is the universal gas constant, and \( T \) is the temperature. Since the bottles contain the same gas at the same temperature, \( T \) and \( R \) are constant.

Given:

1. Volume of Bottle B (\( V_B \)) is twice that of Bottle A (\( V_A \)).
   \[
   V_B = 2V_A
   \]

2. Mass of gas in Bottle B is half that in Bottle A. Since the gas is the same, this also means the number of moles in Bottle B (\( n_B \)) is half that in Bottle A (\( n_A \)).
   \[
   n_B = \frac{1}{2} n_A
   \]

Using the Ideal Gas Law for both bottles:

For Bottle A:
\[
P_A V_A = n_A RT
\]

For Bottle B:
\[
P_B V_B = n_B RT
\]

Substitute the given relationships into the equations:

\[
P_B \cdot 2V_A = \left( \frac{1}{2} n_A \right) RT
\]

Simplify the equation:

\[
P_B \cdot 2V_A = \frac{1}{2} n_A RT
\]

\[
P_B \cdot 2V_A = \frac{1}{2} P_A V_A
\]

\[
P_B = \frac{1}{4} P_A
\]

Thus,
Transcribed Image Text:### Gas Pressure Comparison **Problem Statement:** Two bottles at the same temperature contain the same kind of gas. Bottle B has twice the volume and half the mass of gas as Bottle A. How does the pressure in Bottle B (PB) compare with the pressure in Bottle A (PA)? **Options:** A) \( P_B = \frac{1}{2} P_A \) B) \( P_B = 2 P_A \) C) \( P_B = \frac{1}{4} P_A \) D) \( P_B = 4 P_A \) E) \( P_B = P_A \) **Explanation:** To solve this, we can use the Ideal Gas Law, which states: \[ PV = nRT \] where \( P \) is the pressure, \( V \) is the volume, \( n \) is the number of moles, \( R \) is the universal gas constant, and \( T \) is the temperature. Since the bottles contain the same gas at the same temperature, \( T \) and \( R \) are constant. Given: 1. Volume of Bottle B (\( V_B \)) is twice that of Bottle A (\( V_A \)). \[ V_B = 2V_A \] 2. Mass of gas in Bottle B is half that in Bottle A. Since the gas is the same, this also means the number of moles in Bottle B (\( n_B \)) is half that in Bottle A (\( n_A \)). \[ n_B = \frac{1}{2} n_A \] Using the Ideal Gas Law for both bottles: For Bottle A: \[ P_A V_A = n_A RT \] For Bottle B: \[ P_B V_B = n_B RT \] Substitute the given relationships into the equations: \[ P_B \cdot 2V_A = \left( \frac{1}{2} n_A \right) RT \] Simplify the equation: \[ P_B \cdot 2V_A = \frac{1}{2} n_A RT \] \[ P_B \cdot 2V_A = \frac{1}{2} P_A V_A \] \[ P_B = \frac{1}{4} P_A \] Thus,
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