We_Are_One
New member
...desperate & totally confuse! Help? Pleae please please, if anyone is good in Chemistry and is willing to help, I would greatly appreciate it! These problems have me stump and confuse. I've started on my other homework problems, just that these three questions have me really confuse. Thank you in advance!!!
1) Calculate Delta S Standard values for the rollowing reactions by using tabulated Delta S Standard values. In each case explain the sign of Delta S Standard.
a) N2H4(g) + H2(g) ------> 2 NH3(g)
Delta S Standard Values for N2H4= 238.5 J/mol-K; H2=130.58 J/mol-K; NH3= 192.5 J/mol-K
b) K(s) + O2(g) --------> KO2(s)
Delta S Standard Values for K= 64.67 J/mol-K; O2= 205.0 J/mol-K; KO2= 122.5 J/mol-K
c) Mg(OH)2 (s) + 2 HCl(g) -------->MgCl2(s) + 2 H2O(l)
Delta S Standard Values for Mg(OH)2= 63.24 J/mol-K; HCl=186.69; MgCl2= 89.6 J/mol-K; H2O= 69.91 J/mol-K
d) CO(g) + 2 H2(g) -------> CH3OH(g)
Delta S Standard values for CO= 179 J/mol-K; H2= 130.58 J/mol-K; CH3OH= 237.6 J/mol-K
2) From the values given for Delta H and Delta S, calculate Delta G Standard for eac h of the following reactions at 298 K. If the reaction is not spontaneous under standard conditions at 298 K, at what tempertuare (if any) would the reaction become spontaneous?
a) 2 PbS(s) + 3 O2(g) ------> 2 PbO(s) + 2 SO2(g)
Detla H Standard= -844 kJ; Delta S Standard = -165 J/K
b) 2 POCl3(g) -------> 2 PCl3(g) + O2(g)
Delta H Standard= 572 kJ; Delta S Standard= 179 J/K
3) Consider the rection 6 H2(g) + P4(g) --------> 4 PH3(g).
a) Calculate Delta G Standard at 298 K.
H2= 0 kJ/mol
P4= 24.4 kJ/mol
PH3= 13.4 kJ/mol
b) Calculate Delta G at 398 K if the reaction mixture consists of 8.0 atm of H2, 0.050 atm of P4, and 0.22 atm of PH3.
1) Calculate Delta S Standard values for the rollowing reactions by using tabulated Delta S Standard values. In each case explain the sign of Delta S Standard.
a) N2H4(g) + H2(g) ------> 2 NH3(g)
Delta S Standard Values for N2H4= 238.5 J/mol-K; H2=130.58 J/mol-K; NH3= 192.5 J/mol-K
b) K(s) + O2(g) --------> KO2(s)
Delta S Standard Values for K= 64.67 J/mol-K; O2= 205.0 J/mol-K; KO2= 122.5 J/mol-K
c) Mg(OH)2 (s) + 2 HCl(g) -------->MgCl2(s) + 2 H2O(l)
Delta S Standard Values for Mg(OH)2= 63.24 J/mol-K; HCl=186.69; MgCl2= 89.6 J/mol-K; H2O= 69.91 J/mol-K
d) CO(g) + 2 H2(g) -------> CH3OH(g)
Delta S Standard values for CO= 179 J/mol-K; H2= 130.58 J/mol-K; CH3OH= 237.6 J/mol-K
2) From the values given for Delta H and Delta S, calculate Delta G Standard for eac h of the following reactions at 298 K. If the reaction is not spontaneous under standard conditions at 298 K, at what tempertuare (if any) would the reaction become spontaneous?
a) 2 PbS(s) + 3 O2(g) ------> 2 PbO(s) + 2 SO2(g)
Detla H Standard= -844 kJ; Delta S Standard = -165 J/K
b) 2 POCl3(g) -------> 2 PCl3(g) + O2(g)
Delta H Standard= 572 kJ; Delta S Standard= 179 J/K
3) Consider the rection 6 H2(g) + P4(g) --------> 4 PH3(g).
a) Calculate Delta G Standard at 298 K.
H2= 0 kJ/mol
P4= 24.4 kJ/mol
PH3= 13.4 kJ/mol
b) Calculate Delta G at 398 K if the reaction mixture consists of 8.0 atm of H2, 0.050 atm of P4, and 0.22 atm of PH3.