Water + CH3OH mixture shows positive deviation from ideal solution behaviour. 100 mL of water is mixed with 100 mL of CH3OH . Then, total volume of the mixture will be

Question

Water + CH3OH mixture shows positive deviation from ideal solution behaviour. 100 mL of water is mixed with 100 mL of CH3OH . Then, total volume of the mixture will be (A)  200 mL  (B) less than 200 mL because of additional H -bonding between H2O and CH3OH  (C) more than 200 mL because H -bonding within H2O molecules vanishes (D) more than 200 mL because H -bond between H2O and CH3OH is weaker than that between H2O and H2O

Tardigrade Admin · Accepted Answer

For (+)ve deviation, Δ H > 0, attractive forces between the molecules becomes weaker, and Δ V> 0 Thus, on mixing 100 mL of water with 100 ml of CH3OH, the total volume increases, i.e. becomes more than 200 mL (100+100) due to weaker attractive force between H2O and CH3OH molecules

Q. Water $+ C H_{3} O H$ mixture shows positive deviation from ideal solution behaviour. $100 m L$ of water is mixed with $100 m L$ of $C H_{3} O H$ . Then, total volume of the mixture will be

$200 m L$

less than $200 m L$ because of additional $H$ -bonding between $H_{2} O$ and $C H_{3} O H$

more than $200 m L$ because $H$ -bonding within $H_{2} O$ molecules vanishes

more than $200 m L$ because $H$ -bond between $H_{2} O$ and $C H_{3} O H$ is weaker than that between $H_{2} O$ and $H_{2} O$

Q. Water +CH3​OH mixture shows positive deviation from ideal solution behaviour. 100mL of water is mixed with 100mL of CH3​OH . Then, total volume of the mixture will be

200mL

less than 200mL because of additional H -bonding between H2​O and CH3​OH

more than 200mL because H -bonding within H2​O molecules vanishes

more than 200mL because H -bond between H2​O and CH3​OH is weaker than that between H2​O and H2​O

For (+)ve deviation, ΔH>0, attractive forces between the molecules becomes weaker, and ΔV>0 Thus, on mixing 100mL of water with 100ml of CH3​OH, the total volume increases, i.e. becomes more than 200mL (100+100) due to weaker attractive force between H2​O and CH3​OH molecules

Q. Water $+ C H_{3} O H$ mixture shows positive deviation from ideal solution behaviour. $100 m L$ of water is mixed with $100 m L$ of $C H_{3} O H$ . Then, total volume of the mixture will be

$200 m L$

less than $200 m L$ because of additional $H$ -bonding between $H_{2} O$ and $C H_{3} O H$

more than $200 m L$ because $H$ -bonding within $H_{2} O$ molecules vanishes

more than $200 m L$ because $H$ -bond between $H_{2} O$ and $C H_{3} O H$ is weaker than that between $H_{2} O$ and $H_{2} O$