Posted by **college** on Friday, July 2, 2010 at 6:19pm.

My question is two parts

How many calories of heat energy would it take to heat 200 mL of water from 20C to 80C?

a) How long would it take to heat the water in the previous question using a heater with a power rating of 50W?

Looking for equations to solve this problem.

- Physics -
**bobpursley**, Friday, July 2, 2010 at 6:29pm
a. heat= 200g*1cal/gC * 60C

b. heat=power*time

time= heat/power= above heat/power.

Well, at this point, you have to change calories to joules, as 50watts=50joules/sec

## Answer this Question

## Related Questions

- physics - A piece of aluminum (specific heat 910 J/kg C) of mass 200 g at 80C ...
- Chemistry - Calculate the amount of heat (in calories) required to raise the ...
- Chemistry - I don't know how to do this question, or even start it. Please Help...
- science - When you freeze water, 80 calories of heat are released into the ...
- physics - A typical woman gives off heat at the rate of about 8000 calories per ...
- physics - A typical woman gives off heat at the rate of about 8000 calories per ...
- physics - A typical woman gives off heat at the rate of about 8000 calories per ...
- Chemistry - How much energy(in calories)would it take to heat 13g of water 2 ...
- specific heat capacity - How much heat would be required to heat 1 gram of pure ...
- physics - How long would it take a 1 200 W heater to melt 1.00 kg of ice at -12....