The change in reaction enthalpy is 49305.02 J / mol
<h2>Further Explanation
</h2>
C = 4.18
delta T = 24.25 - 23.16
= 1.09 mol
= 0.070L * 0.185M
= 0.01295 m
= d * v
= 1.00 * (0.070 + 0.070)
= 0.14g
<h3>So, delta H
</h3>
= q / mol HCl
= [mC (deltaT)] / mol HCl
= (0.14 * 4.18 * 1.09) / (0.01295)
= 49.3 kJ
<h3>To calculate the number of moles for given molarity, we use the equation:
</h3>
Molarity of solution = Moles of solute x 1000 / Volume of solution (in mL)
Molarity of HCl solution = 0.185 M
The volume of the solution = 70.0 mL
<h3>Placing the values in the above equation, we get:
</h3>
0.185 = Mole HCl x 1000 / 70.0
Mole HCl = 0.185 x 70.0 / 1000 = 0.01295mol
<h3>To calculate the change in terms of a reaction, we use the equation:
</h3>
\ Delta H_ (rxn) = (q) (n)
Where,
q = amount of heat absorbed = 638.5 J
n = number of moles = 0.01295 moles
\ Delta H_ (rxn) = change in enthalpy of reaction
<h3>Placing the values in the above equation, we get:
</h3>
\ Delta H_ (rxn) = 638.5J / 0.01295mol = 49305.02J / mol
Therefore, the change in reaction enthalpy is 49305.02 J / mol
Enthalpy (H) is the chemical energy contained in a system. The enthalpy of a system cannot be measured, which can be measured is the change in enthalpy (ΔH) that accompanies the change in the system.
The standard enthalpy of formation is the heat absorbed or released in the formation of one mole of substances from the elements measured at 250C and 1 atmospheric pressure. A standard decomposition enthalpy is a heat absorbed or released in the decomposition of one mole of substances into its elements.
Learn More
Enthalpy brainly.com/question/11604882
Molarity of HCl solution brainly.com/question/11604882
Details
Grade: Middle School
Subject: Chemistry
Keyword: Molarity, HCl, enthalpy
