In a \"coffee cup\" (constant-pressure) calorimeter, how is the heat change of t
ID: 1003683 • Letter: I
Question
In a "coffee cup" (constant-pressure) calorimeter, how is the heat change of the solution related to the change of the reaction? They are equal in magnitude and equal in sign. They are equal in magnitude and opposite in sign The heat change of the reaction is twice that of the solution. The heat change of the reaction is half that of the solution. The heat of formation (Delta H^degree_f) of LiNO_3 (S) is -483.1 kj/mol. The correct chemical equation describing the Delta Hdegree_f of LiNo_3 is: Li^+ (aq) + NO^-_3 (aq) rightarrow LiNO_3(s) Li (s) + 1/2 N_2 (g) + 3/2 O_2 (g) rightarrow LiNO_3 (s) Li_2O (s) + 2NO_2 (g) rightarrow 2LiNO_3 (s) Li^+ (s) + NO_3 (s) rightarrow LiNO_3 (s)Explanation / Answer
31. Heat change at constant pressure is equal to enthalpy change of reactions.
So they are equal in magnitude and opposite in sign. option B
32. Enthalpy Change when 1 mole of a compound is formed from its constitute elements which are in their reference state is called enthalpy of formation.
So option B