0
How long to heat 50 liters of water at 20 degrees Celsius to 60 degrees Celsius with 5400 watts?
Wiki User
∙ 10y ago
To answer this one need to know the specific heat capacity of water, which is usually quoted as 4.2 J/kg/K. It's not actually a constant, but from 20 to 60 degrees at atospheric pressure, it's good enough.
So 4.2 J/kg/K.
K first. 60 deg - 20 deg = 40 deg difference. The increments of degrees and kelvins are the same, so that's also 40 K.
Now kg. 50 litres is a lot of water. Not coincidentally, 1l has a mass of 1kg. So 50kg.
4.2J? Well we can pump is 5400 W, which is 5400 J/s.
Now the maths...
4.2 J/kg/K... we have 50 kg
50 kg * 4.2 J/kg/K = 210 J/K
210 J/k... OK, but we have 40 of them kelvin things...
210 J/K * 40 K = 8400 J
8400 J.... and we have 5400 J/s at our disposal
8400 J / 5400 J/s = 1.6s
1.6 s
Pretty quick. In real life you'd be hard pressed to come close to this. You'd expect some inefficiencies. Time how long it takes for your kettle to boil one litre of water and then see how long it should have taken using the power rating on the base of the kettle. Without looking at your kettle, maybe double?
Wiki User
∙ 10y ago
Add your answer:
Earn +20 pts
What is equivalent of 1omh to watt?
The ohm is the measure of resistance. Asking how to convert Watts to Ohms is like asking how to convert degrees celsius to meters
How many watts are required to raise 1 gallon of water 1 degree F?
1 gallon of water is 4540 cc and 1 degree F is 0.555 degrees C, so raising 4540 cc of water by 0.555 degree C would take 4540x0.555 calories, or 2520 calories. Multiply by 4.2 to convert to joules which gives 10590 joules. Therefore the energy required is 10590 joules which is the same as 10590 watt-seconds. That could be done by 100 watts in 105.9 seconds, or 1000 watts in 10.59 seconds.
How many watts does it take to convert all of a half gallon of water at 55 degrees to 100 percent steam in less than 24 hours so that there's no more water left?
57.73 watt-hours load for 24 hours It takes about 1 Kw of electricity to produce 3.5 lbs of steam from and at 212 F That is 970.2 btu of heat for every 286 watts. 1/2 gallon of water is 4.17 lbs of water. to raise the temperature and convert 1 lb to steam at 100% quality requires 1127.2 btu. for 4.17 lbs that is ~4700 btu. dividing that by 970.2btu/286w = ~1386 watts of energy needed. dividing that by 24 hours will give you a continuous load of 57.73 watt-hours for 24 hours to evaporate 1/2 gallon of water, exclusive of heat losses.
How many watts could a solar panel generate in one day?
The watt is a rate of delivery or use of energy (1 Joule per second) Anything called watts per day means an increase in power per day. (100 watts first day, 200 watts second day, 300 watts third day etc). I'm sure you don't mean that. Direct ("normal" ) sunlight that falls on a square metre is up to about 100 Watts so you'll never get more power from that even with 100% efficiency. Consult the brochures. Probably a few tens of watts per square meter. Energy per day is watts x time-of-sunlight (direct, near 90 degrees). Which will be Joules. 3600x1000 Joules equal 1 Kilowatt-hour, sometimes called "1 unit".
How many watts does solar make?
Solar panels can make enough watts to power your whole house if you have enough of them. Some solar panels will generate 50 watts, 80 watts or 120 watts.
Watts to heat 2000 liters of water?
newtest3
How many watts are needed to heat 2.5 liters of water from 0c to 100c?
"Watt" is a rate of moving energy. Anynumber of watts can heat your liters,but the less watts you use, the longer the job will take.
What does boiler horsepower mean?
Boiler horsepower equals 9809.5 watts. It was used for rating steam boilers and is equivalent to 34.5 pounds (about 15.6 kg) of water evaporated per hour at 212 degrees Fahrenheit (100 degrees Celsius).
What is an express boil point in Watts?
Boiling points are expressed in units of temperature, such as degrees Celsius or Kelvin - not in units of power.
How much wattage is needed to raise 60 liters of cold water to 25 degrees?
As much or as little as you want. Watt is a unit of power, not of energy. If you use less watts, it will take longer to heat the water, but it will still work.
What is equivalent of 1omh to watt?
The ohm is the measure of resistance. Asking how to convert Watts to Ohms is like asking how to convert degrees celsius to meters
What is Celsius converted in Watts?
You simply don't convert such utterly incompatible units. Celsius is used for temperature; Watts for power.
How long does it take the average immersion heater to heat thirty liters to sixty degrees?
Immersion heaters are rated in watts, there is no average size. So, the answer will depend heavily on the wattage of your particular heater. Also, once you know the size, it will heat thirty liters of water at the rate of so many degrees per hour, so you also have to specify the starting temperature. The same heater will take much longer to get to sixty from 0 degrees as it would from 23.
How many watts in refrigerators in 165 liters?
700-1000w
How can you change degrees into watts?
350degrees
Why must you use a standard unit?
Standard Units of what? If you mean of measurement, standard unitsfacilitate science, engineering and trade, as all countries use the same kilograms, degrees-Celsius, Watts or Hertz, etc.
How many watts is required to heat 1 gallon of water from 50 degrees F to 180 degrees F?
"Watt" is a rate of moving energy. The more watts you use, the faster the waterwill heat up. The fewer watts you use, the slower it will heat. If you can affordthe time to wait, then any amount of power will do the job, no matter how small.
