The heat of formation of water is 260 kJ. How much `H_(2)O` is decomposed by 130 kJ of heat?A. 0.25 molB. 1 molC. 0.5 molD. 2 mol

The heat of formation of water is 260 kJ. How much `H_(2)O` is decompo

1.	The heat of formation of water is 260 kJ. How much `H_(2)O` is decomposed by 130 kJ of heat?A. 0.25 molB. 1 molC. 0.5 molD. 2 mol
Answer» Correct Answer - C The reaction for the formation of water is as `H_(2)+(1)/(2)O_(2) to H_(2)O,DeltaH=260kJ` . . (i) On reversing Eq. (i), we get `underset(1mol)(H_(2)O) to H_(2)+(1)/(2)O_(2),DeltaH=-260kJ` . . (ii) `because` By 260 kJ heat, water decomposed=1 mol `therefore `130 kJ heat will decompose water`=(1xx130)/(260)=0.5`mol

Discussion

No Comment Found

Related InterviewSolutions

At 1 atm pressure, `DeltaS=75JK^(-1)mol^(-1),DeltaH=30kJ" "mol^(-1)`, the temperature of the reaction at equilibrium isA. 400 KB. 330 KC. 200 KD. 110 K
The free energy for a reaction having `DeltaH=31400cal,DeltaS=32" cal "K^(-1)mol^(-1)` at `1000^(@)C` isA. `-9336cal`B. `-7386cal`C. `-1936cal`D. `+9336cal`
From an isolated system, `DeltaU=0`, what will be `DeltaS`?
Given, `2Fe+(3)/(2)O_(2)toFe_(2)O_(3),DeltaH=-193.4kJ,Mg+(1)/(2)O_(2)to MgO,DeltaH=-140.2kJ` What is the `DeltaH` for the following reaction? `3Mg+Fe_(2)O_(3) to 3MgO+2Fe`A. `-227.2kJ`B. `-272.3kJ`C. `227.2kJ`D. `272.3kJ`
Heat of formation of `H_(2)O` is -188kJ/mol and `H_(2)O_(2)` is -286 kJ/mol. The enthalpy change for the reaction, `2H_(2)O_(2) to 2H_(2)O+O_(2)`A. 196 kJB. `-196kJ`C. `984kJ`D. `-984kJ`
Assuming enthalpy of combustion of hydrogen at 273 K is -286 kJ and enthalpy of fusion of ice at the same temperature to be +6.0 kJ, calculate enthalpy change during formation of 100 g of ice.A. `+1622 kJ`B. `-1622kJ`C. `+292kJ`D. `-292kJ`
The (i)_____of a syste can be changed by transfer of heat from the surrounding to the system of cive-verse without expenditure of (ii)_____. Identify (i) and (ii) in order to complete the above statement.A. (i)-enthalpy, (ii)-workB. (i)-internal energy, (ii) heatC. (i)-enthalpy, (ii)- heatD. (i)-internal energy, (ii)-work
For the reaction `AtoB,DeltaH=+23kJ//mol and BtoC,DeltaH=-18kJ//mol`, the decreasing order of enthalpy of A,B,C follows the orderA. A,B,CB. B,C,AC. C,B,AD. C,A,B
A system containing some quantity of water in a thermos flask or in an insulated beaker. This would not allow exchange of heat between the system and surrouding through its boundary. This process is called asA. isothermal processB. adiabatic processC. isochoric processD. isobaric process
The quantity of heat measured for a reaction in a bomb calorimeter is equal toA. `DeltaG`B. `DeltaH` is negativeC. `pDeltaV`D. `DeltaE`

The heat of formation of water is 260 kJ. How much `H_(2)O` is decomposed by 130 kJ of heat?A. 0.25 molB. 1 molC. 0.5 molD. 2 mol

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment