At 25.0° C, a 10.00 L vessel is filled with 5.25 moles of Gas A and 8.15 moles of Gas B. What is the total pressure in atm? atm 1 2 3 4 6. C 7 8 CO

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Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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**Gas Laws: Calculating Total Pressure in a Vessel**

**Problem Statement:**

At 25.0° C, a 10.00 L vessel is filled with 5.25 moles of Gas A and 8.15 moles of Gas B. What is the total pressure in atm?

**Instructions:**

1. Use the Ideal Gas Law to solve for the total pressure.
2. Remember that the total pressure is the sum of the partial pressures of the gases in the vessel.

**Equation:**

\[ PV = nRT \]

Where:
- \( P \) 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)
- \( T \) is the temperature in Kelvin

**Conversion:**

Convert the temperature from Celsius to Kelvin:

\[ T(K) = 25.0 + 273.15 = 298.15 \, K \]

**Total Moles:**

Total moles of gases = moles of Gas A + moles of Gas B

\[ n = 5.25 + 8.15 = 13.40 \, \text{moles} \]

**Calculations:**

Using the Ideal Gas Law, solve for \( P \):

\[ P = \frac{nRT}{V} \]

Substitute the values:

\[ P = \frac{(13.40 \, \text{moles})(0.0821 \, \text{L·atm/mol·K})(298.15 \, K)}{10.00 \, \text{L}} \]

Calculate to find the total pressure in atm.

**Note:**

Ensure your calculator is set to use the correct order of operations and unit conversions.

***Calculator Interface:***

A simple calculator interface is provided for manual calculation:

- Number buttons from 0 to 9
- Decimal point
- Plus/Minus sign
- "C" button to clear entries
- "x 10^" for scientific notation adjustments

This exercise helps students understand and apply gas laws in practical scenarios, strengthening problem-solving skills in chemistry.
Transcribed Image Text:**Gas Laws: Calculating Total Pressure in a Vessel** **Problem Statement:** At 25.0° C, a 10.00 L vessel is filled with 5.25 moles of Gas A and 8.15 moles of Gas B. What is the total pressure in atm? **Instructions:** 1. Use the Ideal Gas Law to solve for the total pressure. 2. Remember that the total pressure is the sum of the partial pressures of the gases in the vessel. **Equation:** \[ PV = nRT \] Where: - \( P \) 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) - \( T \) is the temperature in Kelvin **Conversion:** Convert the temperature from Celsius to Kelvin: \[ T(K) = 25.0 + 273.15 = 298.15 \, K \] **Total Moles:** Total moles of gases = moles of Gas A + moles of Gas B \[ n = 5.25 + 8.15 = 13.40 \, \text{moles} \] **Calculations:** Using the Ideal Gas Law, solve for \( P \): \[ P = \frac{nRT}{V} \] Substitute the values: \[ P = \frac{(13.40 \, \text{moles})(0.0821 \, \text{L·atm/mol·K})(298.15 \, K)}{10.00 \, \text{L}} \] Calculate to find the total pressure in atm. **Note:** Ensure your calculator is set to use the correct order of operations and unit conversions. ***Calculator Interface:*** A simple calculator interface is provided for manual calculation: - Number buttons from 0 to 9 - Decimal point - Plus/Minus sign - "C" button to clear entries - "x 10^" for scientific notation adjustments This exercise helps students understand and apply gas laws in practical scenarios, strengthening problem-solving skills in chemistry.
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