Calculate the enthalpy change for the reaction: C6H4(OH)2(aq) + H2O2(aq) <—> C6H4O2(aq) + 2H2O(l) given the following data:

C6H4(OH)2(aq)-->C6H4O2(aq)+H2(g) H= +174.4 kJ

H2O(g)-->H2O(l) H= -43.8 kJ

H2(g)+1/2O2(g)-->H2O(g) H= -241 kJ

H2(g)+O2(g)-->H2O2(aq) H= -191.2 kJ

it is a solid

explanation:

weight of any object is given by

w = m*g

where m is mass of the object and g is the acceleration due to gravity.

for earth the value of g is 9.8 m/s^2 so

w=117.6 n m=12 g=?

117.6=12g => g=9.8 m/s^2

which is the force of gravity on earth.

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