Question

The time required by 1KW heater to raise the temperature of 10 liters through 10 degree selsius is in the of 5 m

Answer 1

The time required by the 1 KW heater to raise the temperature of 10 L of water is 418.4 s

Data obtained from the question

• Power (P) = 1 KW = 1000 W
• Volume of water = 10 L
• Mass of water (M) = 10 × 1000 = 10000 g
• Change in temperature (ΔT) = 10 °C
• Specific heat capacity (C) = 4.184 J/gºC
• Time (t) = ?

How to determine the time

Q = MCΔT

Q = Pt

Pt = MCΔT

Divide both sides by P

t = MCΔT / P

t = (10000 × 4.184 × 10) / 1000

t = 418.4 s

Complete question

What time is required for a 1kw heater to raise the temperature of 10 liters of water to 10 degree Celsius?

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