Water has a specific heat capacity of about 4.2 Kilojoules per kilogram per degree Kelvin, so it would take about 6 Kilowatt Hours of electricity to heat 100 Litres of water from 15 degrees centigrade to 65 degrees centigrade. As a standard immersion heater is 3KW, so it would take 2 hours to heat 100 Litres of water.
Drinking a large amount of carbonated drinks at bedtime can also cause hiccups, as the air in these drinks can distend the stomach. Consuming a large amount of alcohol before going to bed is another possible cause of hiccups during sleep. The excessive amount of alcohol can cause the stomach to distend.
Hiccups that persist over a period of time may cause exhaustion and weight loss from lack of sleep and the interruption of normal eating patterns. Causes The cause of hiccups often is not known, but some of the triggers sometimes thought to cause them include the following: spicy foods, hot liquids, any disease or illness that irritates the nerves that control the diaphragm.