A scientist wants to raise the temperature of a 0.10-kilogram sample of glass from -45°C to 15°C. How much heat energy is required to produce this change in temperature?

F or m u l a f or h e a t e n er g y : Q = m Cp ( T 2 ​ − T 1 ​ ) m − ma ss = 0 , 1 k g Cp − s p ec i f i c h e a t o f g l a ss = 800 k g C ∘ J ​ T 2 ​ = 1 5 ∘ T 1 ​ = − 4 5 ∘ Q = 0 , 1 ∗ 800 ( 15 + 45 ) = 80 ∗ 60 = 4800 J 4800 J i s re q u i re d t o h e a t t hi s g l a ss .

Answered by luana | 2024-06-10

To raise the temperature of a 0.10-kg glass sample from -45°C to 15°C, 4800 Joules of heat energy is required. This calculation uses the formula Q = m ⋅ C p ​ ⋅ ( T 2 ​ − T 1 ​ ) where specific heat capacity for glass is assumed to be 800 J/kg°C. The total temperature change is 60°C leading to the total energy necessary being 4800 J.
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Answered by luana | 2024-10-17