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Bogdan [553]
2 years ago
15

How much thermal energy does it take to raise the temperature of 4.5kg of water for 12C to 97C the specific heat of water is 1.6

8kj
Physics
2 answers:
Rudik [331]2 years ago
7 0

Answer:

The amount of thermal energy needed is 626.6 J

Explanation:

When a certain amount of heat energy Q is supplied to a substance, the temperature of the substance increases according to the equation

where m is the mass of the substance is the specific heat capacity of the substance is the change in temperature

photoshop1234 [79]2 years ago
4 0

<u>Answer:</u>

642.6 kJ

<u>Explanation:</u>

Using the formula for heat energy required:

Q = mc \Delta T ,

where:

C   → specific heat capacity  =  1.68 kJ/kg°C

Q   → heat energy required  =  ?

m   → mass of the object  =  4.5 kg

ΔT → change in temperature  =  97°C - 12°C  =  85°C,

Q = 4.5  x  1.68  x  85

   = 642.6 kJ

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