Answer:
The specific heat capacity value needs to be provided in order to calculate the enthalpy change accurately.
Step-by-step explanation:
To calculate the enthalpy change (ΔH) of the chemical reaction, we need more information such as the specific heat capacity of the solution and the balanced chemical equation of the reaction. The specific heat capacity represents the amount of heat energy required to raise the temperature of a substance by 1 degree Celsius per gram.
Once we have the specific heat capacity (usually given in J/g°C), we can use the following formula to calculate the enthalpy change:
ΔH = (mass of the solution) x (specific heat capacity) x (change in temperature)
To calculate the mass of the solution, we use the density:
mass = volume x density = 250.0 ml x 1.25 g/ml = 312.5 g
Substituting the given values into the formula:
ΔH = 312.5 g x (specific heat capacity) x 7.80°C
The specific heat capacity value needs to be provided in order to calculate the enthalpy change accurately.