EASY
AS and A Level
IMPORTANT
Earn 100

Calculate the standard entropy change of the system in the given below reaction using the standard molar entropy values given here. (Values for  

Sin J K-1 mol-1).

Given:

Fes=27.30MgOs=26.90Mg(s)=32.70Fe2O3s=87.403Mg(s)+Fe2O3s3MgOs+2Fes

Important Questions on Entropy and Gibbs Free Energy

EASY
AS and A Level
IMPORTANT

Calculate the entropy change of the surrounding in the following reaction. Assume that the value of H does not change with temperature.

Cs+O2gCO2g   Hreaction=-393.5 kJ mol-1, carried out at 0°C.

EASY
AS and A Level
IMPORTANT

Calculate the entropy change of the surrounding in the following reaction. Assume that the value of H does not change with temperature.

2Cs+N2gC2N2g   Hreaction=+307.9 kJ mol-1, carried out at 300°C.

EASY
AS and A Level
IMPORTANT

Calculate the entropy change of the surrounding in the following reaction. Assume that the value of H does not change with temperature.

H2g+F2g2HFg   Hreaction=-271.1 kJ mol-1, carried out at standard temperature.

EASY
AS and A Level
IMPORTANT

Calculate the entropy change of the surrounding in the following reaction. Assume that the value of H does not change with temperature.

Sis+2H2gSiH4g   Hreaction=+34.30 kJ mol-1, carried out at -3°C.

 

EASY
AS and A Level
IMPORTANT

Calculate the total entropy change in each of the following reactions using the standard molar entropy values given here.

Values for:

 S in J K-1 mol-1.Given:Ss=31.80H2g=130.6H2Sg=205.7Ss+H2gH2Sg; Hreaction=-20.6 kJ mol-1.

EASY
AS and A Level
IMPORTANT

Calculate the total entropy change in each of the following reactions using the standard molar entropy values given here.

Values for

 S in J K-1 mol-1.Given:Cgraphite=5.700N2g=191.6C2N2g=242.12Cgraphite+N2gC2N2g; Hreaction=+307.9 kJ mol-1.

EASY
AS and A Level
IMPORTANT

Calculate the total entropy change in each of the following reactions using the standard molar entropy values given here.

Values for

S in J K-1 mol-1.Given:Ps=41.10O2g=205.0P4O10s=228.94Ps+5O2gP4O10s; Hreaction=-2984.0 kJ mol-1.

EASY
AS and A Level
IMPORTANT

Calculate the total entropy change in each of the following reactions using the standard molar entropy values given here.

Values for

S in J K-1 mol-1.Given:C3H8g=269.9O2g=205.0CO2g=213.6H2Ol=69.90C3H8g+5O2g3CO2g+4H2Ol; Hreaction=-2219.2 kJ mol-1.