Calorimetry Calibration: Find qrxn, qcal, and Ccal with NaOH and HCl

In summary, the problem is to find the heat of reaction (qrxn), heat capacity of the calorimeter (Ccal), and the change in temperature (∆T) for a reaction between 10mL of 1M NaOH and 5mL of 1M HCl in an adiabatic system. The change in temperature is given as 2.1°C, with the initial temperature being that of the NaOH and the final temperature being after the addition of HCl. The equations to solve this problem are qrxn = -qcal and Ccal = qcal/∆T. With the given information, including the volumes and concentrations of the solutions, the problem can be solved by
  • #1
liwolf
2
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Homework Statement


in the reaction 10mL of 1M NaOH + 5mL of 1M HCl (adiabatic)
given change in temp=2.1°C (temp initial is the temp of NaOH, temp final is acquired after the addition of HCl)
find: qrxn, qcal, Ccal


Homework Equations


qrxn = -qca
Ccal = qcal/∆T


The Attempt at a Solution


sorry but I'm really at total lost here. i took the prerequisite chemistry 4semesters ago
the only thing that i can find in searching are the formula on how to solve them but i can't quite get how to use those given only the dT
 
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  • #2
You are given much more - you know the volumes, you know concentrations (that gives amounts of acid and base), assuming density of 1 g/mL (often done for not too concentrated water solutions) you have also total mass. Plenty of data to solve the question.
 

What is calorimetry calibration?

Calorimetry calibration is the process of determining a calorimeter's sensitivity and accuracy by using known standards with known heat values. This allows for accurate measurement of heat transfer in future experiments.

Why is calorimetry calibration important?

Calorimetry calibration is important because it ensures accurate and reliable measurement of heat transfer in experiments. Without proper calibration, there may be errors in the calculated heat values, leading to incorrect conclusions.

How is calorimetry calibration performed?

Calorimetry calibration is typically performed by using a standard substance with a known heat value, such as water, and measuring its temperature change in the calorimeter. The calculated heat value is then compared to the known value to determine the accuracy of the calorimeter.

What are some common sources of error in calorimetry calibration?

Some common sources of error in calorimetry calibration include heat loss to the surroundings, incomplete mixing of substances, and variation in the heat value of the standard substance due to impurities or temperature differences.

How often should calorimetry calibration be performed?

Calorimetry calibration should be performed regularly, preferably before each experiment, to ensure the accuracy and reliability of the measurements. It is also recommended to perform a calibration after any changes to the calorimeter setup or when using different substances with significantly different heat values.

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