The specific heat of nickel is 0.44 J/g°C. How much energy needed to change the temperature of 95.4g of nickel from 32°C to 22°C. Is the energy absorbed or released?

1 Answer
May 17, 2018

Answer:

#419.76# #J#, Released.

Explanation:

First of all, We will find whether the energy is absorbed or released.

The easiest way to find that is to observe the change in temperature.

We can see that, #"Final Temperature " lt " Initial Temperature"#.

So, The Heat Energy is released.

Now, Let's Calculate the Heat.

We know, #"Heat Released or Absorbed by the Body " = "Mass of the Body" xx "Specific Heat of the Material" xx "Change in Temperature"#.

Mathematically, #Q = msDeltaT#

Now, From the Question,

#color(white)(xxx)Q = 95.4 * 0.44 * (22 - 32)# [As, #DeltaT = T_"final" - T_"initial"#]

#rArr Q = -(95.4 * 0.44 * 10)#

#rArr Q = -419.76#

So, The Heat Energy Released is #419.76# #J#.

The negative sign indicates the energy is released.

Hope this helps.