Question

U ue GyualUl. (4 x 1 Specify which species is reduced and which is oxidised in this reaction. (2x1 Specify which species is the reducing agent and which is the oxidising agent in this reaction. (2x1 2. Reaction of Hy with ethylene, in the presence of a small amount of palladium catalyst, gives ethane: HH Pd(cat) H + H2 Assign oxidation states to all the atoms in the three substances in this equation (5x10 Although there is no transfer of electrons in this reaction of organic compounds, it is regarded as a redox reaction. Explain why this is reasonable, and specify which species is reduced and which is oxidised. (3 x 1 m 3. A 12.0 cm sample of liquid H.O (density 100 g.cm) is heated to 328 °C under an external pressure of 0.8 atm, conditions under which it vapourises 4 ma

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i Gyuque. (i) (iv) (4x 1 Specify which species is reduced and which is oxidised in this reaction (2x Specify which species is the reducing agent and which is the oxidising agent in this reaction. (2x1 2. Reaction of H, with ethylene, in the presence of a small amount of palladium catalyst, gives ethane: +1 Pd(cat) HH H C (-3) (-3) H(+1) 2) (+1H 29C H (+1)+ 0. H(+1) Assign oxidation states to all the atoms in the three substances in this equation. (5 x 11 Although there is no transfer of electrons in this reaction of organic compounds, it is regarded as a redox reaction. Explain why this is reasonable, and specify which species is reduced and which is oxidised (3x10 3. A 12.0 cm sample of liquid HO (density 100g.cm is heated to 328 C under an external pressure of 0.8 atm, conditions under which it vapourises: i) Using the common rules of calculation of oxidation states All the H on ethene have +1 oxidation state and both the carbons have (-2) oxidation state. H2 being in elemental state, both H atoms have 0 oxidation state. In ethane both the carbons have (-3) oxidation state and all 6 H have (+1) state. ii)though we dont see any transfer of electrons, both H atoms of H2 are oxidised from 0 to +1 oxidation state and both the carbons are reduced from -2 to -3 oxidation state. So we calssify this as redox reaction.

Although there is no transfer of electrons in this reaction of organic compounds, it is regarded as a redox reaction. Explain why this is reasonable, and specify which species is reduced and which is oxidised. 3. A 12.0 cm sample of liquid H2O (density 1.00 g.cm) is heated to 328 °C under an external pressure of 0.8 atm, conditions under which it vapourises: (0) Calculate the volume of the gas. (ii) Calculate the mass of the same volume (as in part i) of Co, gas under the same conditions. Calculate temperature of that sample of CO2 (as in part ii) at 8.0 atm pressure in a 20.0 L container, Mass of H2O vapor= 12.Occx 1.00g/cc=128 T=328C=328+273=601 K molar mass of H2O = 18g/mol P=0.8 atın V = ?? R=0.0821L. atrn/mol. K Using ideal gas equation PV = nRT V=nRT/P = [ 12g/18g/mol) x 0.0821L atm/mol. KX601K /0.8 atm =41.12 L 11) If we have same volume of Co@under same conditions, its mass is calculated as PV=[mass/molar mass] RT substituting the given values 41.12L x 0.8atm=[mass/44g/mol] 0.0821 x 601 Mass of CO2 =29.33 g 111) mass=29.33 g P=8.0 atm , V = 20.0L T = ??? Thus T=PV / R = 8. Oatm x 20.0L/(29.33/44) x0.0821L.atrn/mol. K =2923.59K