How much energy is lost to the environment?

Z

zero-G

New member
Electric stove rating = 1kW
Water = 2.3 L
Tenperature change -= 10 to 55 (deg celsius)
Time = 10 minutes

(Hint: The water requires 4.2*10^3 J/Deg Celsius/ Litre)
 
Let

Q = heat required to raise water temp

Q = 2.3*(4.2 x 10^3)*(55 - 10)

Q = 434,700 joules

Let

Qs = heat given off by stove in 10 minutes

Qs = 1 kw * 1000 w/kw * 10 min * 60 sec/min = 600,000 joules

Heat loss = Qs - Q = 600,000 - 434,700 = 165,300 joules

Hope this helps.
 
Back
Top