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Stoichiometry

Stoichiometry
1 BTU/lb.←°F is equivalent to __________ kcal/kg.°C.

2.42
4.97
1
1.987

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Stoichiometry
The heats of vaporisation of CS₂, C₂H₅OH &H₂O are 26.8, 38.6 & 40.6 KJ/kg mole respectively. The order of decreasing inter-molecular forces in these liquids is

CS₂ > H₂O > C₂H₅OH
H₂O > C₂H₅OH > CS₂
CS₂ > C₂H₅OH > H₂O
H₂O > CS₂ > C₂H₅OH

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Stoichiometry
The amount of Zn (atomic weight = 65) required to form 224 c.c. of H₂ at N.T.P. on treatment with dilute H₂SO₄ will be __________ gm.

6.5
0.65
65
0.065

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Stoichiometry
Saturated solution of benzene in water is in equilibrium with a mixture of air and vapours of benzene and water at room temperature and pressure. Mole fraction of benzene in liquid is xB and the vapour pressures of benzene and water at these conditions are PvB and Pvw respectively. The partial pressure of benzene in air-vapour mixture is

(Patm - Pvw)xB
XB.Patm
PvB
XB.PvB

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Stoichiometry
The molecular velocity of a real gas is proportional to (where, T = absolute temperature of the gas).

T
√T
T²
1/√T

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Stoichiometry
Pick out the wrong unit conversion of mass transfer co-efficient.

1 lb/hr.ft³.atm. = 4.8182 kg/hr.m².bar
1 kg/hr . m² = 4.8823 lb/hr . ft²
1 kg/hr.m².atm= 0.98687 kg/hr. m .bar
1 lb/hr . ft² = 4.8823 kg/hr . m²

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