Question 1 (1 point)
Chemistry, 08.03.2021 05:40 brittanyfox411
. (Enthalpy, Rxn Curves, Endo/Exo)
Questions 1-3 of 5 | Page 1 of 2
Question 1 (1 point)
5.00 g of NaOH are dissolved in 0.100 kg of water at 20 °C. After dissolving, the final temperature was
33.2°C.
Determine the change in enthalpy (AH) in kJ/mol for NaOH.
q=m. C.AT
c=4.184 kJ/kg.
moles g + molar mass
(remember, you are calculating the AH for the water, you need to make it the opposite sign for the
crystals)
Оа
O.
Oc
Od
Oe
+44.2 kj/mol
+1.10 kj/mol
-111 kJ/mol
-44.2 kJ/mol
+111 kJ/mol
-1.10 kJ/mol
Question 2 (1 point)
Answers: 3
Chemistry, 22.06.2019 10:00
3. how much energy in joules is required to evaporate .0005 kg of liquid ammonia to vapor at the same temperature? 4. how much energy ( in megajoules ) is given up by .75 kg of water at 0c when it freezes to form ice at 0c? 5. explain how heat works between and at critical temperatures?
Answers: 2
Chemistry, 22.06.2019 14:30
According to le chatelier’s principle, a system in chemical equilibrium responds to stress by shifting the equilibrium in a direction that reduces the stress. normalizes the stress. increases the stress. changes the stress.
Answers: 1
Chemistry, 23.06.2019 00:00
How many atoms or molecules are there in a mole of a substance?
Answers: 1
Chemistry, 23.06.2019 09:00
Need ! assume that the variables x and y are directly related. if k = 8, what is the value for each of the following points? be sure and record your data to be used in the following problem. x y k 0.
Answers: 2
. (Enthalpy, Rxn Curves, Endo/Exo)
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