0.562g of graphite kept in a bomb calorimeter in excess of oxygen at 298K,If the heat capacity of the magntude calorimeter and its component is 20.7kj/k,what is the enthalpy change for aabove reaction at 298K and 1atm.

 

Sir the solution of the above question is given in my book,where I cannot understand why Cv is taken as negative,since according to my opinion it is an  endothermic reaction because their is increase in temprature.

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