10g of Compound X with molecular formula are burned in a constant-pressure calorimeter containing 45g of water at 25. The temperature of the water is observed to rise by 2.432. (You may assume all the heat released by the reaction is absorbed by the water, and none by the calorimeter itself.) Calculate the standard heat of formation of Compound at .

Complete Question

10 g of Compound X with molecular formula    are burned in a constant-pressure calorimeter containing 45g of water at . The temperature of the water is observed to rise by 2.432. (You may assume all the heat released by the reaction is absorbed by the water, and none by the calorimeter itself.) Calculate the standard heat of formation of Compound at

The value is  

Explanation:

From the question we are told that  

    The mass of compound X is

     The mass of water is  

      The temperature of water is  

     The change in the temperature of water is  

Generally the heat adsorbed by water is mathematically represented as

Here  c is the specific heat of water with value  

=>      

Given that the total heat that was generated by the reaction is absorbed by   water then

The negative sign shows that the heat was absorbed

Generally the number of moles of the compound X available is mathematically represented as

Here Z is the molar mass of compound X the value is

=>          

=>          

Generally the standard heat of formation of Compound X is mathematically  represented as

=>        

=>        

=>        

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