# Want to Calculate Volume, Given Time, Temperature & Energy

1. Jul 22, 2015

### FarabiBinImran

Hi,
I want to calculate volume of a tank ,

1. Tank contains water and it leaves tank at 7 degree celcius and comes back at 11 degree celcius. So ∇T= 4°C.
2. Time required to complately empty 20 Minutes
3. Energy absorbed in raise from 7ºC to 11ºC = 25 KW
I need to calculate the volume of the Tank which contains water! how much water i need.

Thanks

Last edited: Jul 22, 2015
2. Jul 22, 2015

### Bystander

Which volume? At 7 C, or at 11 C?

3. Jul 22, 2015

### FarabiBinImran

At temperature difference 4 degree Celsius!

4. Jul 22, 2015

### Staff: Mentor

Start by calculating how many kg of water are involved. Try wikipedia to refresh your memory of what is meant by the Specific Heat of a substance.

5. Jul 22, 2015

### Staff: Mentor

This doesn't make sense. The water is never at this temperature; it's just a difference in temperatures, not an actual temperature.

To see this clearly, ask yourself what temperature you would be interested in if we were using Kelvin instead of Celsius: the water is changing temperature from 280 K to 284 K. Would you still want its volume at 4 K?

6. Jul 22, 2015

### Staff: Mentor

Energy is measured in kJ. Power is measured in kW. So you need to make a correction to your statement in 3.