Question

A submersible heater of 100 W raises the water temperature by 7 min 2 L 5°C. What is the mechanical equilibrium of heat?​

Answer 1

Answer:

Example

An electric immersion heater of 1.08kW is immersed in water. After the water has reached a temperature of 100

o

C, how much time will be required to produce 100g of steam

Explanation:

Correct option is

D

210 s

L is the latent heat of vaporization of water, the heat required for producing 1 g of steam.

So, L=540cal=540×4.2=2268J

Here, mL=Pt where P=1.08kW is the supplied power and the required time.

thus, t=

P

mL

=

1.08×10

3

100×2268

=210s