Topic 15 past paper questions 1. (M01) (a) (i) Define the term standard enthalpy of formation. [2] (i
What is an endothermic solution consist of? A spontaneous process - can be either exothermic or endothermic, - can be exothermic, - can be endothermic, - must have zero enthalpy. If H = -54.74 kJ for a chemical reaction, that reaction: a) cannot occur b) is exothermic c) is endothermic...
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e.g. the enthalpy of formation of C -> CO2 such that 1 kmol C combines with 1 kmol O2 to yield 1 kmol CO2 gives off 393,522 kJ/kmol. This measurement for fuels is accomplished and the net result is tabulated as the heating value. If the H2O in the products is liquid it is ...
Gibbs's free energy is denoted by G and that is used to combine enthalpy and entropy into a single value. Change in free energy is equal to the sum of enthalpy plus the product of temperature and entropy of system.Answer and Explanation: ...
Enthalpy / free energy What is cancer? Define it using biological terms. In your own words, define photosynthesis. Define the following word: "antiarthritic". Give the word derived from Greek elements that matches the following: "Caused by (an increase of) energy". Define the following word...
Then indicate if the reaction is entropy driven, enthalpy driven or neither. C_3H_8(g) + 2O_2(g) Calculate the \Delta G °_{rxn} using the following information. 2H_2S(g)+3O_2(g)\rightarrow2SO_2(g)+2H_2O(g) Find the free energy of formation of NaBr(s)...
In this mechanism, the bond dissociation enthalpy (BDE) is an important parameter in evaluating the antioxidant action [5]. The lower the BDE of the H-donating group in the potential antioxidant, the easier it will be for the reaction of free radical inactivation. The SET reaction is ...