Heat of combustion of ethanol at constan...

Heat of combustion of ethanol at constant pressure and at temperature T K(=298 K) is found to be -qJ `"mol"^(-1)`. Hence , heat of combustion (in J `"mol"^(-1)`) of ehtanol at the same temperature at constant volume will be:

RT-q

`-(q+RT)`

q-RT

q+RT

Text Solution

Verified by Experts

The correct Answer is:

`C_(2)H_(5)OH(l) + 3O_(2)(g) rarr 3H_(2)O(r)`
`Deltan_(3)=2-3=-1`
so `DeltaU=DeltaH-Deltan_(g)RT`
`=-q+RT`

Topper's Solved these Questions

THERMODYNAMICS
RESONANCE|Exercise exercise-3 part-2 Advanced level Solutions|27 Videos
THERMODYNAMICS
RESONANCE|Exercise exercise-3 part-III Advanced level Solutions (STAGE-I)|6 Videos
THERMODYNAMICS
RESONANCE|Exercise exercise-3 Part:(I)|23 Videos
TEST SERIES
RESONANCE|Exercise CHEMISTRY|50 Videos

Similar Questions

Explore conceptually related problems

Heat of combustion of ethanol at constant pressue and at temperature TK(=298K) is found to be -qJmal^(-1) . Hence, heat of combustion (in Jmol^(-1) ) of ethanol at the same temperature at constant volume will be:

Heat of combustion of ethanol at constant pressure and at temperature TK is found to be -q J" mol"^(-1) . Hence, heat of combustion (in J mol^(-1) ) of ethanol at the same temperature and at constant volume will be :

The heat of combustion of gaseous methane (CH_(4)) at constant volume is measured in bomb calorimeter at 298K is found to be -885.4kjmol^(-1) . Find the value of enthalpy change at the same temperature.

The heat of combustion of H_(2)(g) at constant pressure and 300k is -280kJ mol^(-1) . What will be the heat of combustion at constant volume and at 300K ?

The heat of combustion of gaseous methan (CH_(4)) at constant volume is measured in a bomb calorimeter at 298 K and is found to be -885.4 kJ mol^(-1) .Find the value of enthalpy change.

The activation energy for a reaction at temperature T K was found to be 2.303" RT J mol"^(-1) . The ratio of the rate constant to Arrhenius factor is

The combustion of benzene (l) gives CO_(2)(g) and H_(2)O(l) . Given that heat of combustion of benzene at constant volume is –3263.9 kJ mol^(–1) at 25^(@)C , heat of combustion (in kJ mol^(–1) ) of benzene at constant pressure will be (R = 8.314 JK–1 mol–1)

RESONANCE-THERMODYNAMICS-exercise-3 part-1 Advanced level Solutions

A coffee cup calorimeter initially contains 125 g of water , at a temp...
Text Solution
|
The molar heat capacities at constant pressure (assumed constant with ...
Text Solution
|
Heat of combustion of ethanol at constant pressure and at temperature ...
Text Solution
|
When 1.0 g of oxalic acid (H(2)C(2)O(4)) is burnt in a bomb calorimete...
Text Solution
|
Benzene burns according to the following equations at 300K (R=8.314 J ...
Text Solution
|
Ethyl chloride (C(2)H(5)Cl) , is prepared by reaction of ethylene with...
Text Solution
|
Which statement regarding entropy is correct?
Text Solution
|
One mole of solid Zn is placed in excess of dilute H(2)SO(4) at 27^(@)...
Text Solution
|
The enthy change for the reaction of 50 ml of ethylene with 50. 0 m...
Text Solution
|
When1 mole of ice melt at 0^(@) C and at constant pressure of 1 atm . ...
Text Solution
|
One mole of ideal monoatmic gas is carried throught the reversible cyc...
Text Solution
|
130 g of Zn is dissolved in dilute sulphuric acid in an open beaker . ...
Text Solution
|
The enthalpy of combustion of propance (C(3)H(8)) gas in temes of give...
Text Solution
|
If x(1),x(2) and x(3) are enthalpies of H-H , O=O and O-H bonds respec...
Text Solution
|
NH(3)(g) + 3Cl(2)(g) rarr NCl(3)(g) + 3HCl(g), " "DeltaH(1) N(2...
Text Solution
|
The enthalpy of formation of H(2)O(l) is -285 KJ mol^(-1) and enthalpy...
Text Solution
|
Ethanol can undergo decompostion to form two sets of products. If th...
Text Solution
|
Find bond enthalpy of S-S bond from the following data: C(2)H(5)-S-C...
Text Solution
|
Given the following equations and DeltaH^(@) values, determine the ent...
Text Solution
|
Animals operate under conditons of constant pressure and most of the p...
Text Solution
|