Chemical Kinetics and Nuclear ChemistryHard
Question
α-maltose (C12H22O11) can be hydrolysed to glucose (C6H12O6) as follows.
C12H22O11(aq) + H2O(l) → 2C6H12O6(aq)
On the basis of following data, identify the correct statement(s) related with the reaction.
$\Delta_{f}H_{C_{12}H_{22}O_{11}(aq)}^{o}$= −2238 kJ/mol, $\Delta_{f}H_{C_{6}H_{12}O_{6}(aq)}^{o}$= −1263 kJ/mol, $\Delta_{f}H_{H_{2}O(l)}^{o}$= −285 kJ/mol
Time (minute) 0 50 100
Conc. of α-maltose (M) 0.4 0.1 0.025
Options
A.The hydrolysis of α-maltose is an exothermic process.
B.Heat liberated in the combustion of 1.0 mole of α-maltose must be greater than the heat liberated in combustion of 2.0 moles of glucose.
C.On increasing the temperature, the extent of hydrolysis of α-maltose will decrease.
D.The hydrolysis of α-maltose follows first-order kinetics.
Solution
(a) ΔrH = $\Sigma$Δf HProducts –$\Sigma$Δf HReactants = 2 × (–1263) – [(–2238) + (–285)] = –3 KJ/mol
(b) Cannot confirm because in aqueous medium, there is no combustion.
(d) Concentration in G.P. in equal time interval.
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