General Thermo
The average kinetic energy of molecules.
What is temperature?
The specific heat of water (units included).
What is 4.18J/gK (or J/goC)?
The enthalpy of combustion for C8H18.
2C8H18 + 25O2 --> 16CO2 + 18H2O dH=-10928 kJ/mol
What is -5464 kJ/mol?
The average energy required to break one mole of bonds in a gaseous compound.
What is bond enthalpy?
The dH of C--> A+B if
A+B --> dH=+300kJ/mol
What is -300kJ/mol?
What is thermal equilibrium?
The equation used to calculate heat in a chemical reaction.
What is q=mc(d)T?
What is
dH = (Sum of dHproducts) - (Sum of dHreactants)?
The average bond enthalpy between C-C bond and C=C bond is...
What is increased?
DAILY DOUBLE
The following sequence of reactions occurs in the commercial production of aqueous nitric acid:
4NH3(g)+5O2(g)⟶4NO(g)+6H2O(l)ΔH=−907kJ4NH3(g)+5O2(g)⟶4NO(g)+6H2O(l)ΔH=−907kJ
2NO(g)+O2(g)⟶2NO2(g)ΔH=−113kJ2NO(g)+O2(g)⟶2NO2(g)ΔH=−113kJ
3NO2+H2O(l)⟶2HNO2(aq)+NO(g)ΔH=−139kJ3NO2+H2O(l)⟶2HNO2(aq)+NO(g)ΔH=−139kJ
The total energy change for the production of one mole of aqueous nitric acid by this process.
What is 495kJ?
The type of energy change that occurs during bond forming.
What is exothermic?
q if 100g of water is raised from 100k to 110K. (in kJ)
What is 4.18kJ?
The enthalpy when 28g of HCl is formed.
CH4 + 3Cl2 --> CH3Cl + 3HCl dH = -336kJ
dH = -87.1 kJ
The equation for bond enthalpy of a reaction.
What is (Sum of bonds broken)-(Sum of bonds formed)?
OR
What is BEreactants-BEproducts?
The independent of the route by which the reaction occurs.
What is Hess's Law?
The type of energy change that is most thermodynamically favorable.
What is exothermic?
The kJ of heat absorbed when the temperature of 200g of water is raised from 10oC to 40oC.
What is 25(.08)kJ?
The enthaply charge for the reaction between hydrochloric acid and sodium hydroxide is -56kJ/mol. Therefore...
What is the reaction is exothermic and the temperature rises?
Whats the enthalpy change of formation for an element in its normal state at 298K
What is 0
The ΔH for the reaction below, given the following reactions and subsequent ΔH values:
PCl5(g) → PCl3(g) + Cl2(g)
P4(s) + 6Cl2(g) → 4PCl3(g) ΔH = -2439 kJ
4PCl5(g) → P4(s) + 10Cl 2(g) ΔH = 3438 kJ
What is 249.8 kj
The law of conservation of energy.
Why is energy neither created nor destroyed?
The heat of reaction, in joules, when 5g of NaCl is dissolved in 10g water if the temperature changed from 14.5oC to 15.5oC.
What is 62.7J.
If you were to attempt to make 45.0g of methane from C02 and H2O, how much heat would be absorbed during the reaction?
What is 25o3 KJ?
The enthalpy of reaction for 2H2 + O2 --> 2H2O.
What is -485kJ?
What is 227kJ?