Final answer:
A) 1000-1200
The calorific value of natural gas typically ranges from 1000 to 1200 Btu per cubic foot, with the correct answer being option (A) for the question asked. It is important for understanding energy content and efficiency when using natural gas for heating or other energy needs.
Step-by-step explanation:
Calorific Value of Natural Gas
The calorific value of natural gas is a critical measure to consider when assessing its energy content. This value is usually expressed in British Thermal Units (Btu) per cubic feet. The higher the calorific value, the more energy the gas contains per unit of volume.
Based on the information provided, the proper classification for the calorific value of natural gas is typically in the range of 1000 to 1200 Btu per cubic foot. Using this knowledge, it can be deduced that option (A) 1000-1200 Btu/cu ft is the correct answer.
For example, 10,000 kcal converts to approximately 40,000 Btu, which is equivalent to 0.4 Therm. This requires about 40 cubic feet of natural gas and aligns well with the option (A) range. Understanding this conversion is important, especially when considering the efficiency and amount of fuel needed for household heating purposes as in the case of the example with a furnace in Sheboygan, Wisconsin.
Another common energy measurement used in billing and heating calculations is the Therm. One Therm is equivalent to 100,000 Btu, or 1.055 × 108 joules, and is closely related to common household measures of natural gas or propane.
It is important to comprehend these energy units and conversions to make informed decisions about energy use, efficiency, and when comparing different energy sources like natural gas and LPG (liquefied petroleum gas).