Question

i give brainliest for the perfect awnser​

Answer 1

Answer:

6) H = m$H_{f}$ + mcT

m is 20

Hf is 336

c is 4.2

T is 25

so

    H = 20x336 + 20x4.2x25

 ANSWER IS,

                      H = 8820 J

5) m=5kg=5000gm

   ddifference in temp = 25 C

   Energy or Q = 7000J

To find heat capacity of the piece of metal,

                         $heat capacity= \frac{Energy}{Difference of Temperature}$

                            $heat capacity = \frac{7000}{25}$

                         heat capacity = 280 J

   To find specific heat capacity,

                          Q = mcT

          so,

                           $c= \frac{Q}{cT}$

                           $c = \frac{7000}{5000x25}$