Lab: Enthalpy Answers

Mass of HCl: g

Mass of solid: g

Total mass of reactants: g

Record the initial temperature of the HCl to the nearest 0.1°C: °C

Temperature farthest from the initial temperature (22.5°C): °C

Mass of HCl: g

Record the initial temperature of the HCl to the nearest 0.1°C: °C

Temperature farthest from the initial temperature (22.7°C): °C

Calculate q, the heat released in each reaction. Use the equation q = cmT.(Use c = 4.18 J/g•°C and the total mass, m.) Record to 2 significant figures.Reaction 1: J

Calculate the number of moles of the solid reactants, which limited the reactions. (See data table for molar masses and formula.)Reaction 1: 0.200.005✔ 0.00823 mol

Calculate the enthalpy of each reaction per mole of reactant using the formula below, which also converts joules to kilojoules. Record to 2 significant figures. Reaction 1: kJ/mol

= °C

Mass of solid: g

= °C

Reaction 2: J

Reaction 2: 1.57✔ 0.0390X 0.0646 mol

Reaction 2: kJ/mol

Total mass of the reactants: g

Did you record all these values in the data table for future use? ✔ yesno