Thursday

September 18, 2014

September 18, 2014

Posted by **Angel** on Sunday, September 18, 2011 at 11:42pm.

(a) Calculate the expected water temperature at 5-minute intervals for the first 60 minutes after the flow of cold water is established

( I have no idea how to solve this problem am completely lost on the equation use and everything please help)

- Excel Problem -
**DrBob222**, Monday, September 19, 2011 at 12:24amheat lost by hot water + heat gained by cold water = 0

initial volume = 3000 L

30 L/min x 5 min = 150L

[mass cold water x specific heat x (Tfinal-Tinitial)] + [mass warm water x specific heat x (Tfinal-Tinitial)] = 0

You know mass cold water (150L = 150kg

You know specific heat water

You know initial T of warm water = 46 C

You know initial T of cold water = 1.7 C.

The only unknown is Tfinal. You can calculate that at 0 min = 46 C

First 5 minutes given by above equation. The next 5 min interval is done the same way.

- Excel Problem -
**Angel**, Monday, September 19, 2011 at 12:55amthe formula giving was T= Tin. - (Tin. - Tint.)e (-v/v)

Where Tin = 1.7 degrees C

and Tin is the to the temperature of the cold water flowing into the tank

**Answer this Question**

**Related Questions**

Chemstry/(microsoft excel) - I am having a hard time solving this problem. The ...

Chemistry - I am having a hard time solving this problem. The formula given is...

moles of water produced? - We mixed HCl and NaOH into water and got this table, ...

physics - an electric hot water heater takes in cold water at 13.0 degrees ...

Math - A pan of cold water with a temeprature of 35 degrees F is brought into a ...

Chem - Can you please tell me if these are right? A gas has a volume of 2.8 L at...

chemistry - a 100.00 mL sample of water has an initial temperature of 20.0 ...

Physics Help!!! - The water in your bathtub is getting cold. You currently have ...

Arrhenius Reaction - The activation energy of a certain reaction is 32.9 kJ/mol ...

Physics - a BATH CONTAINS 100 KG OF WATER AT 60 DEGREES CELCIUS. HOT AND COLD ...