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STOICHIOMETRY

Stoichiometry
Pick out the wrong unit conversion of calorific value.

1 BTU/lb = 2.3 kcal/kg
1 kcal/kg = 1.8 BTU/lb = 4.186 kJ/kg
1 kcal/m³ = 0.1124 BTU/ft³
1 BTU/ft³ = 8.9 kcal/m³ = 0.038 MJ/m³

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Stoichiometry
What fraction of the total pressure is exerted by oxygen, if equal weights of oxygen and methane are mixed in an empty vessel at 25°C?

43864
43832
L/3 x 298/273
43833

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Stoichiometry
For any system, the __________ heat of solution is dependent on the temperature and the adsorbate concentration.

Both A & B
Integral
Differential
Neither A nor B

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Stoichiometry
The vapor pressure of a substance, at its melting point, is __________ in the solid state as compared to that in the liquid state.

Less
Same
More
Either A or B; depends on the nature of the substance

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Stoichiometry
If the absolute temperature of an ideal gas is tripled and simultaneously the pressure is reduced to one third; then the volume of gas will

Decrease three fold
Remain unaltered
Increase three fold
Increase nine fold

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