In a coffee cup calorimeter, 100.0 mL of 1.0 M NaOH and 100.0 mL of 1.0 M HCl are mixed. Both the solutions are originally at 24.6oC. After the reaction, final temperature is 31.3o C. Assuming that all the solutions have a density of 1.0 g/cm3 and a specific heat capacity of 4.18 J/o C. g, calculate the enthalpy change for the neutralization of HCl by NaOH. Assume that no heat is lost to the surrounding or to the calorimeter.

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

level 4 to level 2 : ))