Do they?
Also, how can I prove it with this? *Google translate so it might not be accurate*
Protocols:
For the situation 1a):
1. Measure 50 ml of water help of an graduated cylinder and weigh USING A balance
2. Measure 2.8 grams of KOH using a balance
3. Measure the initial temperature al using a thermometer
4. Mix the two substances together
5. Measure the final temperature thermometer help of an
6. Calculate the amount of heat
For the situation 1b):
1. Measure and weigh 50 ml HCl
2. Measure the initial temperature of HCl and KOH / mix
3. Measure the temperature after mixing
4. Find the amount of heat (as 1b)
5. Find the amount of heat (position 1a + 1b situation)
For situation 2:
1. Measure 50 ml HCl and weigh USING A balance
2. Measure the initial temperature
3. Weigh 2.8 g of KOH using a balance
4. Dissolve the KOH in HCL
5. Measure the temperature of substances mixed with a thermometer
6. Calculate the amount of heat.
Results:
Table 1a for location) dissolution of KOH
Mass of KOH
2.8 g
Body of Water
50 ml or 47 g
T (initial) water
23 C
T (final) water
29 C
Delta T
6 C
Amount of heat
70.39 J
Table 1b for location) neutralization of HCl by KOH
T of the KOH solution
29 C
T l HCl
22 C
T (average) before neutralization
23 C
T (final) after neutralization
31.5 C
Total mass of the two solutions
96.03 g
DeltaT
6 C
Amount of heat associated with neutralization (position 1b)
2414.19 J
Amount of heat associated with neutralization (1b + situation situation 1a)
2484.58 J
Table for Situation 2
HCL temperature before
22 C
Mass of KOH
2.8 g
Temperature after HCL
41 C
HCL solution mass
49.43 g
Delta T
19 C
Amount of heat
3935.12 j
Not sure if I calculated all that right and need to translate that myself, so will update it in english later!