AIPMT 2005 | Thermodynamics Question 57 | Chemistry

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AIPMT 2005

MCQ (Single Correct Answer)

-1

The absolute enthalpy of neutralisation of the reaction :

Mg(O)_(s) + 2HCl_(aq) $$ \to $$ MgCl_2(aq) + H₂O_(l) will be

$$-$$57.33 kJ mol^$$-$$1

greater than $$-$$ 57.33 kJ mol^$$-$$1

less than $$-$$ 57.33 kJ mol^$$-$$1

57.33 kJ mol^$$-$$1

AIPMT 2004

MCQ (Single Correct Answer)

-1

Considering entropy (S) as a thermodynamic parameter, the criterion for the spontaneity of any process is

$$\Delta {S_{system}} + \Delta {S_{surroundings}} > 0$$

$$\Delta {S_{system}} - \Delta {S_{surroundings}} > 0$$

$$\Delta {S_{system}} > 0\,\,\,$$only

$$\Delta {S_{surroundings}} > 0$$ only

AIPMT 2004

MCQ (Single Correct Answer)

-1

Standard enthalpy and standard entropy changes for the oxidation of ammonia at 298 K are $$-$$ 382.64 kJ mol^$$-$$1 and $$-$$ 145.6 kJ mol^$$-$$1, respectively. Standard Gibb's energy change for the same reaction at 298 K is

$$-$$ 221.1 kJ mol^$$-$$1

$$-$$339.3 kJ mol^$$-$$1

$$-$$ 439.3 kJ mol^$$-$$1

$$-$$ 523.2 kJ mol^$$-$$1

AIPMT 2004

MCQ (Single Correct Answer)

-1

The work done during the expansion of a gas from a volume of 4 dm³ to 6 dm³ against a constant external pressure of 3 atm is (1 L atm = 101.32 J)

$$-$$ 6 J

$$-$$ 608 J

+ 304 J

$$-$$ 304 J

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