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The specific heat of copper metal is 0.385 J/(g × °C). How much energy must be added to a 35.0 gram sample of copper to change the temperature from 20.0°C to 65.0°C? (2 points)
270 J
809 J
606 J
1130 J

Respuesta :

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q = mC∆T 

where: 
q = heat 
m = mass of substance = 35.0 grams 
C = 0.385 J/g*C 
∆T = change in temperature = 65C - 20C = 45C 

q = (35.0 g)*(0.385 J/g*C)*(45C) = 606 J 
asuwafohjames

The amount of heat energy that must be added to the copper is 606 J.

To calculate the amount of heat energy that must be added to the sample of copper, we use the formula below.

Formula:

  • Q = cm(t₂-t₁)............... Equation 1

Where:

  • Q = Amount of heat energy
  • c = specific heat capacity of  copper metal
  • m = mass of copper
  • t₂ = Final temperature
  • t₁ = Initial temperature.

From the question,

Given:

  • m = 35 g
  • c = 0.385 J/g°C
  • t₁ = 20 °C
  • t₂ = 65 °C

Substitute these values into equation 1

  • Q = 35(0.385)(65-20)
  • Q = 606.375 J
  • Q ≈ 606 J

Hence, The amount of heat energy that must be added to the copper is 606 J.
Learn more about heat energy here: https://brainly.com/question/13439286