how much energy is required to heat 2 kg of water?
533139
Total heat = Heat required to convert 2 kg of ice to 2 kg of water at 0 °C + Heat required to convert 2 kg of water at 0 °C to 2 kg of water at 20 °C. Therefore, to melt 2 kg of ice 835.48 KJ of heat is required.
1033595
To convert 100.0 g of water at 20.0 °C to steam at 100.0 °C requires 259.5 kJ of energy.
421506
The energy required to change water from a liquid to a solid is 333.7 kJ/kg while the energy required to boil water is 2257 kJ/kg.
1024849
Heat capacity. The specific heat capacity of water is 4,200 Joules per kilogram per degree Celsius (J/kg°C). This means that it takes 4,200 J to raise the temperature of 1 kg of water by 1°C. Lead will warm up and cool down fastest because it doesn't take much energy to change its temperature.
627876
The specific heat capacity of a material is the energy required to raise one kilogram (kg) of the material by one degree Celsius (°C). The specific heat capacity of water is 4,200 joules per kilogram per degree Celsius (J/kg°C). This means that it takes 4,200 J to raise the temperature of 1 kg of water by 1°C.
1387274
How much energy is required to heat the water that will be consumed when one person has a shower? Using a 9 l/min shower head for a 6 minute shower results in 54 litres of water being consumed. 54 litres heated from ambient 15 deg C to shower temperature 40 deg C requires 1.6 kWh of energy.
60206
To calculate the amount of heat released in a chemical reaction, use the equation Q = mc ΔT, where Q is the heat energy transferred (in joules), m is the mass of the liquid being heated (in kilograms), c is the specific heat capacity of the liquid (joule per kilogram degrees Celsius), and ΔT is the change in ...
389986
Phase changes in pure water occur at a specific temperature. At 1 atm, water freezes at 0° C and boils at 100° C. The energy required to change water from a liquid to a solid is 333.7 kJ/kg while the energy required to boil water is 2257 kJ/kg.
809779
['A small calorie (cal) is the amount of energy required to raise the temperature of 1 gram (g) of water by 1º Celsius (º C).', 'A large calorie (kcal) is the amount of energy required to raise 1 kilogram (kg) of water by 1º C. It is also known as a kilocalorie.']
27195
The specific heat capacity of water is 4,200 Joules per kilogram per degree Celsius (J/kg°C). This means that it takes 4,200 J to raise the temperature of 1 kg of water by 1°C. Lead will warm up and cool down fastest because it doesn't take much energy to change its temperature.
22458
It takes 100 calories to heat 1 g. water from 0˚, the freezing point of water, to 100˚ C, the boiling point. However, 540 calories of energy are required to convert that 1 g of water at 100˚ C to 1 g of water vapor at 100˚ C. This is called the latent heat of vaporization.
82745
However, current best processes for water electrolysis have an effective electrical efficiency of 70-80%, so that producing 1 kg of hydrogen (which has a specific energy of 143 MJ/kg or about 40 kWh/kg) requires 50–55 kWh of electricity.
924713
It takes about 4200 J per liter/degree. Then you need to crystallize the water. It takes 333 KJ to cristallize 1 kg or 1 l of water (the density of water is 1). So in total you need to extract 417 KJ of energy.
415287
Each kilogram of (EN Standard) dry wood contains 5.14 kWh of "potential heat" so 1 kWh of energy is contained in (1/5.14=) 0.195 kg of wood. If your wood heater's Gross Efficiency was (say) 70% then the actual amount of wood that you would need to produce 1 kWh of heat is (0.195/0.70=) 0.279 kg.
1210
1 cup of warm water (around 250ml) burns only about 12 calories.
401847
The specific heat capacity of a material is the energy required to raise one kilogram (kg) of the material by one degree Celsius (°C). The specific heat capacity of water is 4,200 joules per kilogram per degree Celsius (J/kg°C).
372082
To increase a temperature by 1°C of water, we need a total of 4181 Joules energy. So supposing that the temperature of water is 0°C, 1 atm pressure and 1 liter it will take a total of 418100 Joules of energy.