Understanding LPG and Its Calorific Value

Oct 13, 2025 by wbrum.org 61 views

Introduction

In today's world, energy consumption is a crucial aspect of our daily lives. With the increasing demand for energy, it's essential to understand how much energy we consume and how it affects our environment. In this article, we will explore the concept of energy consumption, specifically focusing on a family's LPG (Liquefied Petroleum Gas) consumption. We will calculate the average energy consumed per day by a family that consumes 12 kg of LPG in 30 days, given the calorific value of LPG is 50 kJ/kg.

Understanding LPG and Its Calorific Value

LPG is a widely used fuel for cooking, heating, and other purposes. It is a mixture of propane and butane, which are both hydrocarbons. The calorific value of LPG is the amount of energy released when 1 kg of LPG is completely burned. In this case, the calorific value of LPG is given as 50 kJ/kg.

Calculating Energy Consumption

To calculate the average energy consumed per day, we need to follow these steps:

Calculate the total energy consumed in 30 days: First, we need to calculate the total energy consumed by the family in 30 days. We can do this by multiplying the amount of LPG consumed (12 kg) by the calorific value of LPG (50 kJ/kg).
Convert the total energy from kJ to J: Since the options are given in J, we need to convert the total energy from kJ to J. We know that 1 kJ = 1000 J, so we can multiply the total energy in kJ by 1000 to get the total energy in J.
Calculate the average energy consumed per day: Finally, we can calculate the average energy consumed per day by dividing the total energy consumed in 30 days by 30.

Step-by-Step Calculation

Let's follow the steps outlined above to calculate the average energy consumed per day.

Step 1: Calculate the Total Energy Consumed in 30 Days

To calculate the total energy consumed in 30 days, we multiply the amount of LPG consumed (12 kg) by the calorific value of LPG (50 kJ/kg):

Total Energy (kJ) = 12 kg x 50 kJ/kg = 600 kJ

Step 2: Convert the Total Energy from kJ to J

Since the options are given in J, we need to convert the total energy from kJ to J. We know that 1 kJ = 1000 J, so we can multiply the total energy in kJ by 1000 to get the total energy in J:

Total Energy (J) = 600 kJ x 1000 J/kJ = 600,000 J

Step 3: Calculate the Average Energy Consumed per Day

Finally, we can calculate the average energy consumed per day by dividing the total energy consumed in 30 days by 30:

Average Energy per Day (J) = 600,000 J / 30 = 20,000 J

Conclusion

In conclusion, the average energy consumed per day by a family that consumes 12 kg of LPG in 30 days, given the calorific value of LPG is 50 kJ/kg, is 20,000 J. This calculation helps us understand the energy consumption patterns of a family and can be used to make informed decisions about energy usage.

Discussion

This calculation is a simple example of how energy consumption can be calculated. In real-world scenarios, energy consumption can be affected by various factors such as the efficiency of appliances, the type of fuel used, and the duration of usage. Therefore, it's essential to consider these factors when calculating energy consumption.

Answer

The correct answer is:

c) 20000 J per day

Additional Information

The calorific value of LPG can vary depending on the composition of the fuel.
Energy consumption can be affected by various factors such as the efficiency of appliances, the type of fuel used, and the duration of usage.
Calculating energy consumption can help individuals and organizations make informed decisions about energy usage and reduce their carbon footprint.
A Family's LPG Consumption: Calculating Average Energy Per Day ===========================================================

Q&A: Frequently Asked Questions

Q: What is LPG and why is it used?

A: LPG (Liquefied Petroleum Gas) is a widely used fuel for cooking, heating, and other purposes. It is a mixture of propane and butane, which are both hydrocarbons. LPG is used because it is a clean-burning fuel that produces less pollution compared to other fossil fuels.

Q: What is the calorific value of LPG?

A: The calorific value of LPG is the amount of energy released when 1 kg of LPG is completely burned. In this case, the calorific value of LPG is given as 50 kJ/kg.

Q: How is the average energy consumed per day calculated?

A: To calculate the average energy consumed per day, we need to follow these steps:

Calculate the total energy consumed in 30 days: First, we need to calculate the total energy consumed by the family in 30 days. We can do this by multiplying the amount of LPG consumed (12 kg) by the calorific value of LPG (50 kJ/kg).
Convert the total energy from kJ to J: Since the options are given in J, we need to convert the total energy from kJ to J. We know that 1 kJ = 1000 J, so we can multiply the total energy in kJ by 1000 to get the total energy in J.
Calculate the average energy consumed per day: Finally, we can calculate the average energy consumed per day by dividing the total energy consumed in 30 days by 30.

Q: What is the total energy consumed in 30 days?

A: To calculate the total energy consumed in 30 days, we multiply the amount of LPG consumed (12 kg) by the calorific value of LPG (50 kJ/kg):

Total Energy (kJ) = 12 kg x 50 kJ/kg = 600 kJ

Q: How do we convert the total energy from kJ to J?

A: Since the options are given in J, we need to convert the total energy from kJ to J. We know that 1 kJ = 1000 J, so we can multiply the total energy in kJ by 1000 to get the total energy in J:

Total Energy (J) = 600 kJ x 1000 J/kJ = 600,000 J

Q: What is the average energy consumed per day?

A: Finally, we can calculate the average energy consumed per day by dividing the total energy consumed in 30 days by 30:

Average Energy per Day (J) = 600,000 J / 30 = 20,000 J

Q: What are some factors that affect energy consumption?

A: Energy consumption can be affected by various factors such as the efficiency of appliances, the type of fuel used, and the duration of usage. Therefore, it's essential to consider these factors when calculating energy consumption.

Q: Why is it essential to calculate energy consumption?

A: Calculating energy consumption can help individuals and organizations make informed decisions about energy usage and reduce their carbon footprint.

Q: What is the correct answer to the original question?

A: The correct answer is:

c) 20000 J per day

Additional Information

The calorific value of LPG can vary depending on the composition of the fuel.
Energy consumption can be affected by various factors such as the efficiency of appliances, the type of fuel used, and the duration of usage.
Calculating energy consumption can help individuals and organizations make informed decisions about energy usage and reduce their carbon footprint.