Question

match term with the correct equation.

• change in enthalpy
• change in temperature
• heat gain or loss
• molarity
• percent error

= moles of solute (mol)/ volume of solution (l)
= final temperature - initial temperature
= (mass of solution) x (specific heat) x δt
=\frac{experimental value - theoretical value}{(theoretical value)}\times100%
= h_{products}-h_{reactants}

Explanation:

Step1: Recall molarity definition

Molarity is defined as moles of solute per volume of solution. So, "Moles of solute (mol)/ volume of solution (L)" matches Molarity.

Step2: Recall change - in - temperature formula

Change in temperature is final temperature minus initial temperature. So, "Final temperature - Initial temperature" matches Change in temperature.

Step3: Recall heat - gain - or - loss formula

Heat gain or loss is given by mass of solution times specific heat times change in temperature. So, "(mass of solution) x (specific heat) x $\Delta T$" matches Heat gain or loss.

Step4: Recall percent - error formula

Percent error is the absolute value of the difference between experimental and theoretical values divided by the theoretical value times 100%. So, $\frac{\text{Experimental value}-\text{Theoretical value}}{\text{(Theoretical value)}}\times 100\%$ matches Percent error.

Step5: Recall change - in - enthalpy formula

Change in enthalpy is the enthalpy of products minus the enthalpy of reactants. So, "$H_{products}-H_{reactants}$" matches Change in enthalpy.

Answer:

• Change in enthalpy: $H_{products}-H_{reactants}$
• Change in temperature: Final temperature - Initial temperature
• Heat gain or loss: (mass of solution) x (specific heat) x $\Delta T$
• Molarity: Moles of solute (mol)/ volume of solution (L)
• Percent error: $\frac{\text{Experimental value}-\text{Theoretical value}}{\text{(Theoretical value)}}\times 100\%$