How many BTUs are in 5 therms of gas?

To determine the number of BTUs in 5 therms of gas, it's essential to understand the conversion between therms and BTUs. Specifically, 1 therm is equivalent to 100,000 BTUs. Therefore, to find the BTUs in 5 therms, you multiply the number of therms by the BTUs per therm.

So, the calculation is straightforward:

5 therms × 100,000 BTUs/therm = 500,000 BTUs.

This calculation clearly shows that 5 therms of gas contain 500,000 BTUs, which aligns with the correct answer. Having this understanding of unit conversions is crucial in applications such as energy management and heating calculations in various systems.