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Which reaction shows that the enthalpy of formation of H2S is Hf -20.6 kJmol?
H2(g) + S(s) —> H2S + 20.6 kJ
Which reaction shows that the enthalpy of formation of H2S is Hf -20.6 kJ mol?
H2(g) + S(s) H2S + 20.6 kJ
Which reaction shows that the enthalpy of formation of C2H4 is Hf 52.5 kJ mol?
2C(s) + 2H2(g) + 52.5 kJ -> C2H4
Which reaction shows that the enthalpy of formation of cs2 is hf 89.4 kJ mol?
C(s) + 2S(s) + 89.4 kJ --> CS2(l)
Calculate the change in enthalpy for the Mg HCl reaction using standard enthalpies of formation delta hf for HCl aq equals -167.2 kj and delta hf for MgCl2 aq equals -791.2 kj?
-1282.5J
Which reaction shows that the enthalpy of formation of H2S is Hf -20.6 kJmol?
H2(g) + S(s) —> H2S + 20.6 kJ
Which reaction shows that the enthalpy of formation of C2H4 is Hf 52.5 kJ mol?
2C(s) + 2H2(g) + 52.5 kJ -> C2H4
Which reaction shows that the enthalpy of formation of H2S is Hf -20.6 kJ mol?
H2(g) + S(s) H2S + 20.6 kJ
which reaction shows that the enthalpy of formation of C2H4 is Hf = 52.5 kJ/mol?
2C(s) + 2H2(g) + 52.5 kJ -> C2H4
Which reaction shows that the enthalpy of formation of cs2 is hf 89.4 kJ mol?
C(s) + 2S(s) + 89.4 kJ --> CS2(l)
Calculate the change in enthalpy for the Mg HCl reaction using standard enthalpies of formation delta hf for HCl aq equals -167.2 kj and delta hf for MgCl2 aq equals -791.2 kj?
-1282.5J
Why HF has high neutralization enthalpy?
Because of high value of hydration energy.
What do the symbols mean Delta Hr Hf Hc Hn Ha in chemistry btw i know theyre enthalpy changes?
delta Hr is the enthalphy change of a reaction delta Hf is the enthalpy of formation where one mole of a substance is formed ( generally in its naturally occurring physical state) delta Hc is the enthalpy of combustion where one mole of a substance in its standard state undergoes combustion delta Hn is the enthalpy of neutralization where one mole of H+ reacts with OH- to form one mole of H2O delta Ha is the enthalpy of atomization where a molecule splits to form its neutral atomic components
Why is the standard enthalpy change of neutralization between hydrofluoric acid and sodium hydroxide more negative than usual?
Because of high of heat of Hydration of HF ( Fluoride ion is extensively hydrated because of it's small size )
Write an equation for the formation of HF gas from its elements in its standard states?
1/2H2(g) + 1/2F2(g) -> HF(g)
WHY HF is dibasic?
Because of the formation of hydrogen bond H-F F-H
What is the chemical reaction of HF and water?
Not a chemical reaction, but the formation of a water solution of hydrofluoric acid.
