What unit of energy is equivalent to one kilowatt of power used for one hour?

The unit of energy that is equivalent to one kilowatt of power used for one hour is indeed the kilowatt-hour (kWh). This unit represents the amount of energy consumed when a device uses one kilowatt of electrical power for one hour.

To break it down further, one kilowatt equals 1,000 watts, so when you multiply that by the duration of one hour, you end up with 1 kW x 1 hour = 1 kWh. This unit is commonly used in electricity billing and helps consumers understand their energy usage in a practical context.

In contrast, other units like BTU (British Thermal Unit) and therm are measures of heat energy, and they serve different purposes in evaluating energy consumption. Kilowatts (kW) is a measure of power, not energy, which is what the question is specifically asking about. Therefore, kWh is the appropriate choice when discussing energy usage over time with respect to kilowatts.