1. The total energy of one mole of an ideal monatomic gas at 27°C is __________ calories. (JEE 1984)
Answer (3/2)RT = (1.5 mol)[1.987 cal/ (K mol.)](300 K) = 894.15 cal.
2. A system is said to be ___________ , if it can neither exchange matter nor energy with the surroundings. (JEE 1993)
Answer: isolated
3. The heat content of the products is more than that of the reactants in an _____________ reaction. (JEE 1993)
Answer: endothermic
4. When Fe (solid) is dissolved in acqueous hydrochloric acid in a closed vessel, the work done is _________________ . (JEE 1997)
Answer: zero
5. Enthalpy is an ____________ property. (JEE 1997)
Answer: extensive property.
It depends on mass of the substance
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