Home
Class 11
CHEMISTRY
When 1.0g of oxalic acid (H(2)C(2)O(4)) ...

When 1.0g of oxalic acid `(H_(2)C_(2)O_(4))` is burned in a bomb calorimeter whose heat capacity is 8.75kJ/K, the temperature increases by 0.312K. The enthalpy of combustion of oxalic acid at `27^(@)C`

A

`-245.7kJ//mol`

B

`-244.452kJ//mol`

C

`-241.5kJ//mol`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
D
`H_(2)C_(2)O_(4)(l)+(1)/(2)O_(2)(g)rarrH_(2)O(l)+2CO_(2)(g)`,
`Deltan_(g)=3//2`
`DeltaU_(c )=-(0.312xx8.75)/(1)xx90`
=-245.7 kJ/mol
`DeltaH=DeltaU+Deltan_(g)RT`
`=-245.7 +(3)/(2)xx(8.314xx300)/(1000)`
=-241.95 kJ/mol
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    NARENDRA AWASTHI|Exercise Level 1 (Q.1 To Q.30)|6 Videos

  • THERMODYNAMICS

    NARENDRA AWASTHI|Exercise Level 1 (Q.31 To Q.60)|2 Videos

  • STOICHIOMETRY

    NARENDRA AWASTHI|Exercise Level 3 - Subjective Problems|20 Videos

Similar Questions

Explore conceptually related problems

Heat of combustion of benzoic acid (C_6H_5COOH) at constant volume at 25^@C is -3233KJ//"mole" . When 0.5g of benzoic acid is burnt in bomb calorimeter, the temperature of calorimeter increased by 0.53^@C . Now in the same bomb calorimeter 1g of C_2H_6 burnt then temperature increased by 2.04^@C . DeltaH for combustion of C_2H_6 is

4.184g of benzoic acid was burnt in bomb calorimeter. The rise in the temperature is 10^@ . The heat capacity of calorimeter and its contents is 2.644 kcal K^(-1) . Calculate the heat of combustion of benzoic acid.

When oxalic acid (H_(2)C_(2)O_(4)) is used as reducing agent, the acid is oxidised to carbondioxide. Calculate the equivalent weight of the acid.

The weight of oxalic acid crystals, H_(2)C_(2)O_(4)2H_(2)O required to prepare 500 ml of 0.2 N solution is,

A sample of CH_(4) of 0.08g was subjected to combustion at 27^(@)C in a bomb calorimeter. The temperature of the calorimeter system was found to be raised by 0.25^(@)C . If heat capacity of calorimeter is 18 kJ//""^(@)C, Delta H for combustion of CH_(4) at 27^(@)C is

0.5 g mixture of oxalic acid (H_(2)C_(2)O_4) and some sodium oxalate (Na_(2)C_(2)O_4) with some impurities requires 40 ml of 0.1M NaOH for complete neutralization and 6ml of 0.2 M KMnO_4 for complete oxidation. Calculate the % of Na_2C_(2)O_4 in the mixture