Chemistry

For adiabatic process,which is correct

Options

(a) ΔT = 0 (b) ΔS = 0 (c) q = 0 (d) q(p) = 0

Correct Answer:

q = 0

Explanation:

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In an isobaric process,when temperature changes from T₁ to T₂, ΔS is equal to

Options

(a) 2.303 Cp log (T₂/T₁) (b) 2.303 Cp ln(T₂/T₁) (c) Cp ln (T₁/T₂) (d) Cv ln (T₂/T₁)

Correct Answer: […]

For a spontaneous process the correct statement is

Options

(a) entropy of the system always increases (b) free energy of the system always increases (c) total entropy change is always negative (d) total entropy […]

For the reaction one of the mole of zinc dust with one mole of sulphuric acid in a bomb calorimeter, ΔU and w coorespond to

Options

(a) ΔU< 0,w = 0 (b) ΔU < […]

ΔH°f (298 K) of methanol is given by the chemical equation

Options

(a) CH₄(g) + 1/2 O₂(g) → CH₃OH(g) (b) C + 1/2 O₂(g) + 2H₂(g) → CH₃OH(l) (c) C(diamond) + 1/2 O₂(g) + […]

How much energy is released when 6 moles of octane is burnt in air? Given ΔH°f for CO₂(g), H₂O(g) and C₈H₁₈respectively are -490, -240 and +160 kJ/mol

Options

(a) -6200 kJ (b) -37440 kJ […]

Which one of the following has ΔS⁰ greater then zero

Options

(a) CaO(s)+ CO₂(g) ⇌ CaCO₃(s) (b) NaCl(aq) ⇌ NaCl(s) (c) NaNO₃(s) ⇌ Na⁺(aq) + NO₃⁻(aq) (d) N₂(g) + 3H₂(g) ⇌ 2NH₃(g)

Correct Answer: […]

One gram sample NH₄NO₃ is decomposed in a bomb calorimeter.The temperature of the calorimeter increases by 6.12K.The heat capacity of the system is 1.23kJ/g/deg.What is the molar heat of decomposition for NH₄NO₃

Options

(a) […]