H_2(g) + F_2(g) rightarrow 2HF(g) Delta H_rxn degree = -546.6 kJ 2H_2 (g) + O_2(
ID: 1050606 • Letter: H
Question
H_2(g) + F_2(g) rightarrow 2HF(g) Delta H_rxn degree = -546.6 kJ 2H_2 (g) + O_2(g) rightarrow 2H_2O(1) Delta H_rxn degree = -571.6 kJ Calculate the value of Delta H_ degree for 2F_2(g) + 2 H_2O(l) rightarrow 4HF(g) + O_2 (g)? A researcher studying the nutritional value of a new candy place? a 6.90 gram sample of the candy inside a bomb calonmeter and cembusts it in excess oxygen. The observed temperature increase is 2.43 degree C. If the heat capacity of the calonmeter is 43.50 kJ. k^-1 how many nutritional calenes are there per gram J candy? If you combine 230.0 mL of water at 25.00 degree C and 140.0 mL of water at 95.00 degree C, what is the final temperature of the mixture? Use 1.00 glmL as the density of water. An 80.0 gram sample of a gas was heated mm 25 degree C to 225 degree C. During the process, 346 J of work was done by the system and its interval energy increased by 8075J. What is the specific heat of the gas?Explanation / Answer
6) The given reactions are :-
H2(g) + F2(g) -----------------> 2HF(g) Delta H = -546.6 KJ
2H2(g) + O2(g) -----------------> 2H2O(l) Delta H = -571.6 KJ
The reaction given is :-
2F2(g) + 2H2O(l) ------------> 4HF(g) + O2(g)
Delta H0(rxn) = 2(-546.6 KJ) + 571.6 KJ = -521.6 KJ
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