What is the free energy change G when 10 moles of water at 100°C and 1 atm pressure is converted into steam at 100° C and 1 atm pressure?
540 cal
-9800 cal
9800 cal
0 cal
Among the following groupings which represent the collection of isoelectronic species.
NO+, C, C, CO
N2, C, CO, NO
CO, NO+, CN-, C
NO, CN-, N2, O
In which of the following ?
N2O4 (g) 2NO2 (g)
2SO2 (g) + O2 (g) 2SO3 (g)
H2 (g) + I2 (g) 2HI (g)
H2 (g) + O2 (g) H2O (l)
The empirical formula of a compound is CH2. One mole of this compound has a mass 42g. Its molecular formula is
C3H6
C2H6
CH2
C2H2
If Kc is the equilibrium constant for the formation of NH3, the dissociation constant of NH3 under the same condition will be
KC
The pH of a soft drink is 3.92. The hydrogen ion concentration will be
( given antilog 0.08 = 1.2)
1.96 × 10-2 mol L-1
1.96 × 10-3 mol L-1
1.2 × 10-4 mol L-1
1.2 × 10-3 mol L-1