How many cubic meters of natural gas or how many kilowatts of electricity is needed to heat 1 ton of 25 ° water to 100?

How many cubic meters of natural gas or how many kilowatts of electricity is needed to heat 1 ton of 25 ° water to 100?

The heat required for temperature rise of 75 degrees: 1000 kg × 75 degrees = 75000 kcal, equivalent to 10 cubic meters of natural gas and 87 degrees of electricity