Question

Work done corresponding to 200cal of heat is

Answer 1

200*4.2 JOULES as we know H/J=4.2

Answer 2

By using Joules law,
W α Q
w=JQ
where J is mechanical heat equivalent.
J=work/Heat=4.18 J/cal
work =heat x 4.18
        =200x 4.18
         =836 joules