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Specific Heat Capacity

An immersion ...

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An immersion heater rated 1000W ,220V is used to heat 0.01m^3 of water . Assuming that the power is supplied at 220V and 60^°/^° of the power supplied is used to heat the water ,how long will it take to increase the temperature of the water from 15^0C to 40^0C ?

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Q. An immersion heater rated 1000 W, 220 V is used to heat 0.01 m³ of water. Assuming that the power is supplied at 220 V and 60% of the power supplied is used to heat the water, how long will it take to increase the temperature of the water from 15°C to 40°C?

Q. Calculate the time required to heat 20 kg of water from 10°C to 35°C using an immersion heater rated 1000 W. Assume that 80% of the power input is used to heat the water. Specific heat capacity of water = 42000 J kg⁻¹ K⁻¹.

Q. An electric immersion heater is switched on for 8 minutes. The heat supplied by it raises the temperature of 500 g of water from

10^{o} C t o 60^{o} C

. Calculate the power of the heater in watts.

Q. A heater coil connected to a

220 V

has a resistance of

150 o h m .

How long will it take for this coil to heat

1 k g

20^{0} C t o 60^{0} C,

assuming that all heat is taken up by water

.

Q. A small electric immersion heater is used to heat

100 g

of water. The power on the heater is labeled as

200 W

. Calculate the time required to raise the temperature from

23^{\circ} C

100^{\circ} C

[

Specific heat capacity of water is

4200 {J/kg}^{\circ} C]

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