Temperature & Pressure – Organic Chemistry Quiz 8
The key terms of this Organic Chemistry course include Pressure, Temperature.
A bicyclist is stopped at the entrance to a valley, as sketched below:
Answer
A 48.0 g sample of glass, which has a specific heat capacity of 0.670 J.g-1oC-1, is dropped into an insulated container containing 300.0 g of water at 25.0 oC and a constant pressure of 1 atm . The initial temperature of the glass is 85.0 oC.
Assuming no heat is absorbed from or by the container, or the surroundings, calculate the equilibrium temperature of the water. Be sure your answer has 3 significant digits.
Answer
26.5 oC
Complete the following table. Round each of your answers to 3 significant digits.
Answer
Temperature & Pressure – Organic Chemistry Quiz 8
A chemist measures the energy change ΔH during the following reaction:
CH4(g) + 2O2(g) -à CO2(g) + 2H2O(l)
ΔH = -882. kJ
Use the information to answer the following question.
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Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming natural gas. In the first step, nitrogen and hydrogen react to form ammonia:
N2(g) + 3H2(g) -à 2NH3(g)
ΔH = -92. kJ
In the second step, ammonia and oxygen react to form nitric acid and water:
NH3(g) + 2O2(g) -à HNO3(g) + H2O(g)
ΔH = -330. kJ
Answer
-376 kJ
Write a balanced chemical equation for the standard formation reaction of gaseous hydrogen bromide (HBr).
Answer
Using the table of standard formation enthalpies that you’ll find under the Data tab, calculate the reaction enthalpy of this reaction under standard conditions:
2HNO2(g) + O2(g) -à 2HNO3(g)
Round your answer to the nearest kJ.
Answer
-109 kJ
A 48.0 g sample of glass, which has a specific heat capacity of 0.670 J.g-1oC-1, is dropped into an insulated container containing 300.0 g of water at 25.0 oC and a constant pressure of 1 atm . The initial temperature of the glass is 85.0 oC.
Assuming no heat is absorbed from or by the container, or the surroundings, calculate the equilibrium temperature of the water. Be sure your answer has 3 significant digits.
Answer
26.5 oC
Complete the following table. Round each of your answers to 3 significant digits.
Answer