Helium is commonly used in balloons because it is lighter than air. It was first discovered by ___________ in the year _________
2 answers:
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The question is incomplete, here is the complete question:
If 65 mL of sulfuric acid and 25 mL of sodium hydroxide were mixed and the solution had a density of 1.01 g/mL, What is the heat of the calorimeter in kJ given the temperature change of the above equation is -5.5 K. You may assume the solution has a heat capacity of 4.180 J/gK. Express your final answer in kJ and with 2 decimal places
<u>Answer:</u> The heat of the calorimeter is 2.09 kJ
<u>Explanation:</u>
To calculate the mass of solution, we use the equation:
Density of solution = 1.01 g/mL
Volume of solution = [65 + 25] mL = 90 mL
Putting values in above equation, we get:
To calculate the heat released by the reaction, we use the equation:
where,
q = heat released
m = mass of solution = 90.9 g
c = heat capacity of solution = 4.180 J/g.K
= change in temperature = -5.5 K
Putting values in above equation, we get:
Heat released by the solution will be equal to the heat absorbed by the calorimeter.
<u>Sign convention of heat:</u>
When heat is absorbed, the sign of heat is taken to be positive and when heat is released, the sign of heat is taken to be negative.
Heat absorbed by the calorimeter = -(-2.09) = 2.09 kJ
Hence, the heat of the calorimeter is 2.09 kJ
<u>Answer:</u>
<u>For 1:</u> The value of for above reaction is 36.83
<u>For 2:</u> The value of for above reaction is 36.83
<u>For 3:</u> The equilibrium partial pressure of Indium is 0.126 atm
<u>For 4:</u> The equilibrium partial pressure of hydrogen gas is 0.094 atm
<u>For 5:</u> The equilibrium partial pressure of Indium dihydrogen is 0.018 atm
<u>Explanation:</u>
We are given:
Partial pressure of Indium gas = 0.0650 atm
Partial pressure of hydrogen gas = 0.0330 atm
Partial pressure of Indium dihydride = 0.0790 atm
The given chemical equation follows:
<u>Initial:</u> 0.065 0.033 0.079
<u>At eqllm:</u> 0.065-x 0.033-x 0.079+x
- <u>For 1:</u>
The expression of for above reaction follows:
Putting values in above equation, we get:
Hence, the value of for above reaction is 36.83
- <u>For 2:</u>
We are given:
of the reaction = 1.48
There are 3 conditions:
- When
; the reaction is product favored.
- When
; the reaction is reactant favored.
- When
; the reaction is in equilibrium.
As, for the given reaction, the reaction is reactant favored.
Hence, the reaction proceed in the backward direction to attain equilibrium
- <u>For 3:</u>
The expression of for above reaction follows:
Putting values in above equation, we get:
Neglecting the value of x = 0.835 because the reaction is going backwards. So, by taking this value, the pressure of the reactants will decrease
So, equilibrium partial pressure of Indium = (0.065 - x) = [0.065 - (-0.061)] = 0.126 atm
- <u>For 4:</u>
The equilibrium partial pressure of hydrogen gas = (0.033 - x) = [0.033 - (-0.061)] = 0.094 atm
- <u>For 5:</u>
The equilibrium partial pressure of Indium dihydrogen = (0.079 + x) = [0.079 + (-0.061)] = 0.018 atm