Asked Feb 13, 2020

When one mole of calcium carbonate reacts with ammonia, solid calcium cyanamide, CaCN2, and liquid water are formed. The reaction absorbs 90.1 kJ of heat. Write a balanced thermochemical equation for the reaction. Calculate ΔHf° for calcium cyanamide 


Expert Answer

Step 1

Given that calcium carbonate reacts with ammonia to form solid calcium cyanamide and also given that reaction absorbs 90.1 k J of heat. The balanced equation for the reaction is,

Chemistry homework question answer, step 1, image 1

Step 2

Given the reaction and standard enthalpy of formation of reactant and reaction and using these values, enthalpy of formation for the given product can be determined.

Chemistry homework question answer, step 2, image 1


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