14279
37
Zoom out
Zoom in
Previous page
1/55
Next page
20020601
English
Activity: Operating the EquipmentActivity: Operating the Equipment
MeasurementMeasurement
2-12-2
í Reaction Path 1 Measurement
u Turn on the auto stirrer and start a measurement operation with the calculator.
u Little-by-little, add sodium hydroxide (
s) to the distilled water, and observe how the
temperature changes.
u After all the sodium hydroxide (
s) is dissolved and the temperature rise stabilizes,
determine the heat of dissolution.
u Turn on the auto stirrer and start a measurement operation with the calculator.
u Little-by-little, add the hydrochloric acid (
aq) to the sodium hydroxide (aq), and observe
how the temperature changes.
u After all the hydrochloric acid (
aq) is added and the temperature rise stabilizes, determine
the heat of neutralization.
u Calculate the sum of heat by adding the heat of neutralization to the heat of dissolution.
í Reaction Path 2 Measurement
u Turn on the auto stirrer and start a measurement operation with the calculator.
u Little-by-little, add sodium hydroxide (
s) to the hydrochloric acid (aq), and observe how the
temperature changes.
u After all the sodium hydroxide (
s) is dissolved and the temperature rise stabilizes,
determine the heat of neutralization.
u Calculate the heat, and compare it with the total heat you calculated for Reaction Path 1.
55555555555555555555555
5555555555555555555555
55555
Other Things To Do
55555
í Calculator Operation
u Use the Temperature Measurement Setup to measure the temperature and then display it.
u Find the applicable program in the Program Library (P.2-16-3), input it into your calculator,
and then run it.
1 Beaker
2 Te mperature Probe
3 Sodium Hydroxide (s)
u Determine whether this activity verifies Hess’s Law. If it does not, consider the
reason why.
u Compare the theoretical chemical reaction expression and the measurement
results. If they do not match, consider the reason why.
u Find out if Hess’s Law holds true for other chemical reactions.
1 Beaker
2 Te mperature Probe
3 Hydrochloric Acid
(aq)
1 Beaker
2 Te mperature Probe
3 Sodium Hydroxide
(s)
4 Distilled Water
5 Te mperature rise due
to heat of dissolution
4 Sodium Hydroxide (aq)
5 Te mperature rise due
to heat of neutralization
4 Hydrochloric Acid (aq)
5 Te mperature rise due
to heat of neutralization
When converting the temperature rise to joule heat, be sure to take the difference in the volume of
water into consideration. The specific heat of distilled water is 4.2J/g°C.
37


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for Casio EA200 at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of Casio EA200 in the language / languages: English as an attachment in your email.

The manual is 2,37 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info