Corticosteroids are also used supportively to prevent nausea, often in combination with 5-HT3 antagonists (e.g. ondansetron). Typical undesired effects of glucocorticoids present quite uniformly as drug-induced Cushing's syndrome.
Common causes. A gas explosion occurs when the gas/air mixture reaches a critical value, then any spark, flame or heat source can ignite the mixture. The explosion is caused when the rapidly expanding, burning gas is confined and builds up pressure. As the pressure builds, something has to give, and in a home gas explosion it is usually the windows.
If you also wanted to convert the water to steam, you'd have to add the latent heat of vaporization to that, which is Q = mL. The latent heat of vaporization for water is 2260 KJ/kg, so the additional energy required is (3.785 kg)(2260 KJ/kg) = 8554 KJ, for a total of 9819 KJ.