Question 239967

use NH2CONH2(s), is manufactured on a large scale and used as a fertilizer. To investigate its properties a student places 120.0 mL Of water at 25.0°C into a coffee cup Caloura metre and immerses a thermometer in the water. After about a minute, the student add 5.0 g Of solid urea to the water and measures the temperature of the solution as the urea dissolves. Temperature drops to 22.9°C.

a) calculate the molar enthalpy of solution for urea an H2CONH2(s)

b) Write the thermochemical equation for this reaction