thermochemistry
Ba (OH)2 (s) + 2 NH4Cl (s) → BaCl2 (s) + 2 NH3 (g) + 2 H2O (l)
DHf° (kJ/mol) -626.56 -314.55 -495.73 -45.90 -285.83
Mass of water | 5.678 g |
Ti | 2.33 |
Tf | -21.33 |
a. calculate the heat lost when the mass of water (g) cools from Ti to 0 °C. This is q1. This is the change in part A of the graph.
b. calculate the heat lost when the mass of water changes from liquid to solid (ice). This is q2. This is the change in part B of the graph.
c. calculate the heat lost when the water cools from 0 °C to Tf. This is q3. This is the change in part C of the graph.
d. calculate the total heat lost from the surroundings: q1 + q2 + q3.
e. calculate the heat absorbed by the system.
f. calculate the value of DHrxn° for the reaction in the system.
g. calculate the number of moles of barium hydroxide in a reaction that absorbs the amount of heat you calculated in 5.
h. calculate the number of moles of ammonium chloride required to react with the mass of barium hydroxide calculated in 7.
I. calculate the grams of each reactant required.
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would you please review my answers and help me with the ones that not answered because...
would you please review my answers and help me with the ones
that not answered because im stuck. questions 1-9
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can you please help me with this. im really confused specially on question 2 1. Voice...
can you please help me with this. im really confused specially
on question 2
1. Voice the mass of water (g) 3549g the initial temperature of the water (7 the fmal temperature of the ice ( 12.19 C 14.01 C You will then calculate 1. the heat lost when the mass of water (g) cools from Ti to 0°C. This is i. This is the change in part A of the graph. 2. the heat lost when the mass of...
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I need this by today pls help!
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1) The heat of solution (delta H) For sodium hydroxide is -44.5 kJ/mol calculate the amount...
1) The heat of solution (delta H) For sodium hydroxide is
-44.5 kJ/mol calculate the amount of energy involved when 5.0 g
sodium hydroxide is dissolved in water
2) calculate the change in temperature expected when 5.0 g
sodium hydroxide is dissolved in 50.0 g water using the energy
(Joules) calculated above. (Ccal= 4.5J/g°C, include 4.0g magnetic
stir-bar in the total mass)
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In the diagram q1 =15.0μC and q2 = - 2.0μC are placed on the two corners...
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a. What is the electric potential energy (in units of
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q2?
b. What is the electric potential (in units of
106Volts) at c due to
q1 and q2?
c. Now, you bring a particle of mass m=1.5
x10-6kg and excess charge q3 =
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would you please review my answers and help me with the ones
that not answered because im stuck. questions 1-9
the mass of water us 3.549g
the initial temp of water is 12.19 degree C
the final temperature of the water is -14.01 degree C
How much of each reactant do you need to rernove enough heat to freeze the water? That is the question you are going to answer. A The system, surroundings and the flow of beat In...
can you please help me with this. im really confused specially
on question 2
1. Voice the mass of water (g) 3549g the initial temperature of the water (7 the fmal temperature of the ice ( 12.19 C 14.01 C You will then calculate 1. the heat lost when the mass of water (g) cools from Ti to 0°C. This is i. This is the change in part A of the graph. 2. the heat lost when the mass of...
Calorimetry Lab
-Finding speficic heat capacity of calorimeter C(cal)
I need this by today pls help!
Exp.5 CHEMICAL EQUILIBRI 2. (2 marks) Table 1: Determining the heat capacity of the calorimeter. Run 1 Run 2 Run 3 Mass of the hot water, m. (g): Initial temperature of the hot water, T. (°C): Mass of the cold water, me (g): Initial temperature of the cold water and calorimeter, T. (°C): Final temperature of the mixture, T. (°C): Heat lost by the...
1) The heat of solution (delta H) For sodium hydroxide is
-44.5 kJ/mol calculate the amount of energy involved when 5.0 g
sodium hydroxide is dissolved in water
2) calculate the change in temperature expected when 5.0 g
sodium hydroxide is dissolved in 50.0 g water using the energy
(Joules) calculated above. (Ccal= 4.5J/g°C, include 4.0g magnetic
stir-bar in the total mass)
Prelab Exercise: The Heat of solution (H) for sodium hydroxide is -44.5 kJ/mol. Calculate the amount of energy...
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q2?
b. What is the electric potential (in units of
106Volts) at c due to
q1 and q2?
c. Now, you bring a particle of mass m=1.5
x10-6kg and excess charge q3 =
5.0 μC from infinity and place it...
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