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ANS-The standard enthalpy of formation for an element in its standard state is ZERO. Elements in their standard state are not formed, they just are. CORRECT ANS- Ni(s) because only Ni present in the element state. that's why it is right option [ THANK YOU VERY MUCH,HOPE THIS WILL HELP YOU.GOOD LUCK]
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in the reaction below, change of H =0 for
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DITU U11 U1 18. In the reaction below, AHf is zero for Ni (s) + 200...
DITU U11 U1 18. In the reaction below, AHf is zero for Ni (s) + 200 (g) + 2PF3 (g) → Ni(CO)2 (PF3)2 (1) A) Ni (s) B) CO (8) C) PF3 (g) D) Ni(CO)2(PF3)2 (1) E) both CO (g) and PF3 (g)
QUESTION 9 If two reactions are coupled, then 2. A product of one reaction is a...
QUESTION 9 If two reactions are coupled, then 2. A product of one reaction is a reactant of the other, and the overall process is product-favored. b. A product of one reaction is a reactant of the other, and the overall process is reactant-favored C. The heat released from an exothermic reaction is used in an endothermic reaction. The Gibbs free energy released from a product-favored reaction is released to the surroundings. causing an increase in entropy for a second...
Determine the amount of heat involved in a chemical change using. Hess's Law Question 2C(s) +...
Determine the amount of heat involved in a chemical change using. Hess's Law Question 2C(s) + 0,(g) + 2 CO(g) AH = -222 kJ 2 H, (g) + O2(g) + 2H2O(g) AH = -484 kJ H,0(1) H2O(g) AH = +44 kJ Use the thermochemical data above to calculate the change in enthalpy for the reaction below. H,0(1) + C(s) + CO(g) +H, () . Your answer should have three significant figures. Provide your answer below: Activity Details You have viewed...
in 19 The following reaction takes place at 120°C-H 0(1) - H 0(g) Which of the...
in 19 The following reaction takes place at 120°C-H 0(1) - H 0(g) Which of the following must be true? AH = 44.0 kJ mol AS = 0.119 kJ mol K ered ed out of Ein Select one: a. The reaction is spontaneous Flag question b. The reaction is not spontaneous CAG=0 d. AGO e. Two of these Finish attempt. Time left 3:13:19 e lp @ NI Wololol **** 2x Cy BN м.
FOUAL ERAME ethe a Akd 30) The transtion of a chemical from the Sgid phe to...
FOUAL ERAME ethe a Akd 30) The transtion of a chemical from the Sgid phe to the sollid phase is ealled b) meting ublimation d) vaporization e)condensation 51) For the chemical species in the resction below, A- for 2Ce () H ( PF, ()-2HCo(PF () a) Co (s) b) H. (в) c) PF (g) d) HCo(PF) (1) e) both Co(s) and H: (g) 52) The value of Ar for the reaction below is-144 Jimol. Determine the reaction energy (J) whem...
The standard enthalpy change for the following reaction is - 52.3 kJ at 298 K. C2H4(g)...
The standard enthalpy change for the following reaction is - 52.3 kJ at 298 K. C2H4(g) — 2 C(s.graphite) + 2 H2(g) AH° = -52.3 kJ What is the standard enthalpy change for this reaction at 298 K? 2 C(s,graphite) + 2 H2(g) — C2H4(9) LLUCU The standard enthalpy change for the following reaction is -240 kJ at 298 K. Ni(s) + 1/2 O2(g) → Nio(s) AH° = -240 kJ What is the standard enthalpy change for the reaction at...
26. The internal energy can be increased by a) transferring heat from the surroundings to the...
26. The internal energy can be increased by a) transferring heat from the surroundings to the ystem (b) transferring heat from the system to the surroundings c) doing work on the system A) a only B)b only C) c only D) a and c E) b and e 27. For the species in the reaction below, AHf is zero for 2Co (s) + H2 (3)+ 8PF3 () 2HCo(PF3)4) A) Co (s) B) H2 (3) C) PF3 (8) 1D) HCo(PF3)40 E)...
(9) A spontaneous process has the change of free energy (a) AG > 0 (b) AG <0 (c) AG = 0 (d) AH >0 and AS &...
(9) A spontaneous process has the change of free energy (a) AG > 0 (b) AG <0 (c) AG = 0 (d) AH >0 and AS <0 (10) A chemical reaction has AH = 10 kJ, AS = 50 J/K at temperature T = 300 K, the reaction AG = (a) 5000 (b)-5000 (c) 10000 (d) 50 (11) For reaction : Ag (s) + 1/2 Cl2 (g) = Agt (aq) + CI+ (aq), the standard free energy of formation: AGE"...
43) The value of for the reaction below is -790 kJ. The enthalpy change accompanying the...
43) The value of
for the reaction below is -790 kJ. The enthalpy change accompanying
the reaction of 0.95 g of S is __________ kJ. 2S(s) + 3O2 (g) à
2SO3(g)
A) 23
B) -23
C) -12
D) 12
E) -790
AH
4. For which of the following reactions is AH° of the reaction equal to AH, of...
4. For which of the following reactions is AH° of the reaction equal to AH, of the product? (a) CO (9) + 0.5 O2 (g) (b) Al(s) + 3 CI (g)- (c) Ni (s) + O2 (g) (d) 12 (g) + 3 F2 (g) CO2 (9) AICI: (s) NiO2 (s) 2 IF3 (9)
DITU U11 U1 18. In the reaction below, AHf is zero for Ni (s) + 200 (g) + 2PF3 (g) → Ni(CO)2 (PF3)2 (1) A) Ni (s) B) CO (8) C) PF3 (g) D) Ni(CO)2(PF3)2 (1) E) both CO (g) and PF3 (g)
QUESTION 9 If two reactions are coupled, then 2. A product of one reaction is a reactant of the other, and the overall process is product-favored. b. A product of one reaction is a reactant of the other, and the overall process is reactant-favored C. The heat released from an exothermic reaction is used in an endothermic reaction. The Gibbs free energy released from a product-favored reaction is released to the surroundings. causing an increase in entropy for a second...
Determine the amount of heat involved in a chemical change using. Hess's Law Question 2C(s) + 0,(g) + 2 CO(g) AH = -222 kJ 2 H, (g) + O2(g) + 2H2O(g) AH = -484 kJ H,0(1) H2O(g) AH = +44 kJ Use the thermochemical data above to calculate the change in enthalpy for the reaction below. H,0(1) + C(s) + CO(g) +H, () . Your answer should have three significant figures. Provide your answer below: Activity Details You have viewed...
in 19 The following reaction takes place at 120°C-H 0(1) - H 0(g) Which of the following must be true? AH = 44.0 kJ mol AS = 0.119 kJ mol K ered ed out of Ein Select one: a. The reaction is spontaneous Flag question b. The reaction is not spontaneous CAG=0 d. AGO e. Two of these Finish attempt. Time left 3:13:19 e lp @ NI Wololol **** 2x Cy BN м.
FOUAL ERAME ethe a Akd 30) The transtion of a chemical from the Sgid phe to the sollid phase is ealled b) meting ublimation d) vaporization e)condensation 51) For the chemical species in the resction below, A- for 2Ce () H ( PF, ()-2HCo(PF () a) Co (s) b) H. (в) c) PF (g) d) HCo(PF) (1) e) both Co(s) and H: (g) 52) The value of Ar for the reaction below is-144 Jimol. Determine the reaction energy (J) whem...
The standard enthalpy change for the following reaction is - 52.3 kJ at 298 K. C2H4(g) — 2 C(s.graphite) + 2 H2(g) AH° = -52.3 kJ What is the standard enthalpy change for this reaction at 298 K? 2 C(s,graphite) + 2 H2(g) — C2H4(9) LLUCU The standard enthalpy change for the following reaction is -240 kJ at 298 K. Ni(s) + 1/2 O2(g) → Nio(s) AH° = -240 kJ What is the standard enthalpy change for the reaction at...
26. The internal energy can be increased by a) transferring heat from the surroundings to the ystem (b) transferring heat from the system to the surroundings c) doing work on the system A) a only B)b only C) c only D) a and c E) b and e 27. For the species in the reaction below, AHf is zero for 2Co (s) + H2 (3)+ 8PF3 () 2HCo(PF3)4) A) Co (s) B) H2 (3) C) PF3 (8) 1D) HCo(PF3)40 E)...
(9) A spontaneous process has the change of free energy (a) AG > 0 (b) AG <0 (c) AG = 0 (d) AH >0 and AS <0 (10) A chemical reaction has AH = 10 kJ, AS = 50 J/K at temperature T = 300 K, the reaction AG = (a) 5000 (b)-5000 (c) 10000 (d) 50 (11) For reaction : Ag (s) + 1/2 Cl2 (g) = Agt (aq) + CI+ (aq), the standard free energy of formation: AGE"...
43) The value of
for the reaction below is -790 kJ. The enthalpy change accompanying
the reaction of 0.95 g of S is __________ kJ. 2S(s) + 3O2 (g) à
2SO3(g)
A) 23
B) -23
C) -12
D) 12
E) -790
AH
4. For which of the following reactions is AH° of the reaction equal to AH, of the product? (a) CO (9) + 0.5 O2 (g) (b) Al(s) + 3 CI (g)- (c) Ni (s) + O2 (g) (d) 12 (g) + 3 F2 (g) CO2 (9) AICI: (s) NiO2 (s) 2 IF3 (9)
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