Question

How many Joules of heat would be required to heat 0.5 kg of aluminum by 2K? A) 300 J B) 450 J C) 900 J D) 1800 J

Answer 1

your answer is c. 900 joules of heat

Answer 2

C) 900 J

Step-by-step explanation:

Calculate the heat needed to heat 0.5 kg of aluminum.

As the problem does not tell us that there is a change of state during this process the formula of heat that we must use is

`Q=mc\Delta T`

`m= 0.5 Kg`

`c(specific heat)= 880 J/Kg.K` (this value is a constant for aluminum)

`\Delta T= 2K`

`Q= 0.5 Kg . 880 (J)/(Kg.K).2 K\\Q= 880 J`

The exact amount of heat to heat 0.5 kg of heat is 880 J, but this value could be rounded to the nearest hundred that would be 900 J