Examples of Combined Gas Law Applications in Real Life

📚 Quick Study Guide

• 🌡️ The Combined Gas Law expresses the relationship between pressure (P), volume (V), and temperature (T) for a fixed amount of gas: $\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}$.
• 📏 This law is useful when dealing with changes in conditions of a gas.
• ⚠️ Temperature must be in Kelvin (K) for calculations: $K = °C + 273.15$.
• 💨 The amount of gas (number of moles) remains constant.

🧪 Practice Quiz

1. Question 1: A gas occupies 10.0 L at standard temperature and pressure (STP). If the temperature is increased to 273°C and the pressure is doubled, what is the new volume?
   1. 5.0 L
   2. 10.0 L
   3. 20.0 L
   4. 40.0 L
2. Question 2: A balloon contains 5.0 L of gas at 25°C and 1 atm. If the pressure is increased to 2 atm and the temperature is decreased to -23°C, what is the new volume of the balloon?
   1. 2.26 L
   2. 3.0 L
   3. 6.0 L
   4. 10.0 L
3. Question 3: A container of gas has a volume of 15.0 L at a pressure of 3.0 atm and a temperature of 298 K. If the volume is increased to 25.0 L and the temperature is increased to 348 K, what is the new pressure?
   1. 1.5 atm
   2. 2.0 atm
   3. 2.5 atm
   4. 3.0 atm
4. Question 4: A gas occupies 20.0 L at 2.0 atm and 200 K. If the pressure is decreased to 1.0 atm and the temperature is increased to 400 K, what is the new volume?
   1. 10.0 L
   2. 20.0 L
   3. 40.0 L
   4. 80.0 L
5. Question 5: A sample of gas has a volume of 12.0 L at a pressure of 1.5 atm and a temperature of 300 K. If the pressure is changed to 3.0 atm and the temperature is changed to 400 K, what is the new volume?
   1. 6.0 L
   2. 8.0 L
   3. 10.7 L
   4. 16.0 L
6. Question 6: What real-life scenario best demonstrates the Combined Gas Law?
   1. Baking a cake.
   2. A car tire changing pressure with temperature during a drive.
   3. Melting ice cream.
   4. Boiling water.
7. Question 7: A rigid container holds a gas at a constant volume. If the temperature increases, what happens to the pressure, according to the Combined Gas Law?
   1. It decreases.
   2. It increases.
   3. It remains constant.
   4. It fluctuates randomly.