How much energy is needed to heat and melt 3.0 kg of copper initially at 83°c? 450 kcal 430 kcal 280 kcal 130 kcal

Hi Brainiac! Thanks for asking a question here on in the physics category.

We need to figure out the melting point of the energy in order to see how much energy is needed. 

✦ Find the melting point of the copper
✦ Multiply the mass by the heat and temperature of the melting point.
✦ Figure out the heat fusion of the copper. 
✦ Add together the solution. 

Q = mcΔT  = (3.0kg)(387J/kg * C°)
(1084 C° - 83 C°) 
= 1.1 x 10^6J 
= 280 kcal 

Letter C

Hope that helps! ★ If you have further questions about this question or need more help, feel free to comment below or post another question and send the link to me. -UnicornFudge aka Nadia 

The energy required would be 280 kcal

Explanation:

We can find out the required amount of energy with the help of the equation

Q = mcΔT

where m shows the mass

c shows the specific heat

and ΔT shows the heat change

So putting the values in the equation

Energy to reach melting point = mass x specific heat x change in temperature from 83 C to melting point.

=(3.0kg)(387J/kg•°C)(1084°C - 83°C)  

= 1.1 x 10^6J

OR

280 Kcal