A gas sample is under an initial set of conditions (i) and is then changed to a final set of conditions (f). Use the combined gas law to calculate the unknown final parameter for this gas sample. P 3.90 atm V 3.00 L T 310. K P, ? atm V, 6.90 L T 470. K

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### Gas Law Problems: Calculate the Unknown Parameter

**Instructions**: This question has multiple parts. Work all the parts to get the most points. 

A gas sample is under an initial set of conditions (i) and is then changed to a final set of conditions (f). Use the combined gas law to calculate the unknown final parameter for this gas sample.

#### Problem (a)

- **Initial Conditions (i):**  
  \( P_i = 3.90 \text{ atm} \)  
  \( V_i = 3.00 \text{ L} \)  
  \( T_i = 310. \text{ K} \)  

- **Final Conditions (f):**  
  \( P_f = ? \text{ atm} \)  
  \( V_f = 6.90 \text{ L} \)  
  \( T_f = 470. \text{ K} \)  

Use the equation:

\[ P_i V_i / T_i = P_f V_f / T_f \]

to solve for \( P_f \):

\[ P_f = \_\_\_\_\_\_ \text{ atm} \]

#### Problem (b)

- **Initial Conditions (i):**  
  \( P_i = 4.37 \text{ atm} \)  
  \( V_i = 1.82 \text{ L} \)  
  \( T_i = 289 \text{ K} \)  

- **Final Conditions (f):**  
  \( P_f = 2.01 \text{ atm} \)  
  \( V_f = ? \text{ L} \)  
  \( T_f = 370. \text{ K} \)  

Use the equation:

\[ P_i V_i / T_i = P_f V_f / T_f \]

to solve for \( V_f \):

\[ V_f = \_\_\_\_\_\_ \text{ L} \]

**Explanation**:
- \( P \) represents pressure
- \( V \) represents volume
- \( T \) represents temperature
- Subscript \( i \) refers to initial conditions
- Subscript \( f \) refers to final conditions

By understanding and applying the Combined Gas Law, we can determine unknown variables given a set of initial and final conditions of a gas sample.
Transcribed Image Text:### Gas Law Problems: Calculate the Unknown Parameter **Instructions**: This question has multiple parts. Work all the parts to get the most points. A gas sample is under an initial set of conditions (i) and is then changed to a final set of conditions (f). Use the combined gas law to calculate the unknown final parameter for this gas sample. #### Problem (a) - **Initial Conditions (i):** \( P_i = 3.90 \text{ atm} \) \( V_i = 3.00 \text{ L} \) \( T_i = 310. \text{ K} \) - **Final Conditions (f):** \( P_f = ? \text{ atm} \) \( V_f = 6.90 \text{ L} \) \( T_f = 470. \text{ K} \) Use the equation: \[ P_i V_i / T_i = P_f V_f / T_f \] to solve for \( P_f \): \[ P_f = \_\_\_\_\_\_ \text{ atm} \] #### Problem (b) - **Initial Conditions (i):** \( P_i = 4.37 \text{ atm} \) \( V_i = 1.82 \text{ L} \) \( T_i = 289 \text{ K} \) - **Final Conditions (f):** \( P_f = 2.01 \text{ atm} \) \( V_f = ? \text{ L} \) \( T_f = 370. \text{ K} \) Use the equation: \[ P_i V_i / T_i = P_f V_f / T_f \] to solve for \( V_f \): \[ V_f = \_\_\_\_\_\_ \text{ L} \] **Explanation**: - \( P \) represents pressure - \( V \) represents volume - \( T \) represents temperature - Subscript \( i \) refers to initial conditions - Subscript \( f \) refers to final conditions By understanding and applying the Combined Gas Law, we can determine unknown variables given a set of initial and final conditions of a gas sample.
### Example Problem: Ideal Gas Law Application

Given the following initial and final states of an ideal gas, calculate the unknown final temperature.

**Initial Conditions:**
- Initial Pressure, \( P_i \): 7.71 atm
- Initial Volume, \( V_i \): 8.05 L
- Initial Temperature, \( T_i \): 590. K

**Final Conditions:**
- Final Pressure, \( P_f \): 3.10 atm
- Final Volume, \( V_f \): 7.00 L
- Final Temperature, \( T_f \): ? K

Calculate the final temperature \( T_f \).

\[ T_f = \, \boxed{ \ \ } \, \text{K} \] 

### Explanation:

To solve this problem, we can use the Ideal Gas Law's combined form:

\[ \frac{P_i \cdot V_i}{T_i} = \frac{P_f \cdot V_f}{T_f} \]

Rearrenging to solve for \( T_f \):

\[ T_f = \frac{P_f \cdot V_f \cdot T_i}{P_i \cdot V_i} \]

Substitute the values:

\[ T_f = \frac{(3.10 \, \text{atm}) \cdot (7.00 \, \text{L}) \cdot (590. \, \text{K})}{(7.71 \, \text{atm}) \cdot (8.05 \, \text{L})} \]

Calculate \( T_f \):

\[ T_f = \boxed{K} \]
Transcribed Image Text:### Example Problem: Ideal Gas Law Application Given the following initial and final states of an ideal gas, calculate the unknown final temperature. **Initial Conditions:** - Initial Pressure, \( P_i \): 7.71 atm - Initial Volume, \( V_i \): 8.05 L - Initial Temperature, \( T_i \): 590. K **Final Conditions:** - Final Pressure, \( P_f \): 3.10 atm - Final Volume, \( V_f \): 7.00 L - Final Temperature, \( T_f \): ? K Calculate the final temperature \( T_f \). \[ T_f = \, \boxed{ \ \ } \, \text{K} \] ### Explanation: To solve this problem, we can use the Ideal Gas Law's combined form: \[ \frac{P_i \cdot V_i}{T_i} = \frac{P_f \cdot V_f}{T_f} \] Rearrenging to solve for \( T_f \): \[ T_f = \frac{P_f \cdot V_f \cdot T_i}{P_i \cdot V_i} \] Substitute the values: \[ T_f = \frac{(3.10 \, \text{atm}) \cdot (7.00 \, \text{L}) \cdot (590. \, \text{K})}{(7.71 \, \text{atm}) \cdot (8.05 \, \text{L})} \] Calculate \( T_f \): \[ T_f = \boxed{K} \]
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