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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 1.68kj

Sagot :

onlyanime020

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

saadatk

Answer:

642.6 kJ

Explanation:

Using the formula for heat energy required:

[tex]Q = mc \Delta T[/tex] ,

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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