Heat required to raise the temperature of mercury is given as
[tex]Q = ms\Delta T[/tex]
here given that
m = 56 g
s = specific heat capacity of mercury = 0.140 J/g C
[tex]\Deta T = 289 k[/tex]
now here we have
[tex]Q = 56 * 0.140 * 289[/tex]
[tex]Q = 2265.76 J[/tex]
so it required 2265.76 J of heat