Chemistry-
General
Easy
Question
The enthalpy change for the reaction H2(g)+C2H4(g)→C2H6(g)is........The bond energies are,H–H=103,C–H=99,C–C=80&C=C=145Kcalmol–1
- –10Kcalmol–1
- +10Kcalmol–1
- –30Kcalmol–1
- +30Kcalmol–1
The correct answer is: –30Kcalmol–1
Related Questions to study
chemistry-
Heat of neutralisation of oxalic acid is–106.7KJ mol–1using NaOH hence ΔH of-H2C2O4→C2O2–+2H+is
Heat of neutralisation of oxalic acid is–106.7KJ mol–1using NaOH hence ΔH of-H2C2O4→C2O2–+2H+is
chemistry-General
chemistry-
The change in the enthalpy of NaOH+HCl→NaCl+HO is called:
The change in the enthalpy of NaOH+HCl→NaCl+HO is called:
chemistry-General
chemistry-
Equal volumes of 1M HCl and 1M H2SO4 are neutralised by dilute NaOH solution and x and y K cals of heat are liberated respectively .Which of the following is true-
Equal volumes of 1M HCl and 1M H2SO4 are neutralised by dilute NaOH solution and x and y K cals of heat are liberated respectively .Which of the following is true-
chemistry-General
chemistry-
The temperature of a 5 ml of strong acid increases by 5°C when 5ml of a strong base is added to it.If 10ml of each are mixed temperature should increase by-
The temperature of a 5 ml of strong acid increases by 5°C when 5ml of a strong base is added to it.If 10ml of each are mixed temperature should increase by-
chemistry-General
chemistry-
If H++OH–=H2O+13.7Kcal,then heat of complete neutralisation of one gram mole of H2SO4 with strong base will be-
If H++OH–=H2O+13.7Kcal,then heat of complete neutralisation of one gram mole of H2SO4 with strong base will be-
chemistry-General
chemistry-
The amount of heat liberated when one mole of NH4OH reacts with one mole of HCl is–
The amount of heat liberated when one mole of NH4OH reacts with one mole of HCl is–
chemistry-General
chemistry-
Heat of formation of CO2 is–94.0K.cal.What would be the quantity of heat liberated, when 3g of graphite is burnt in excess of oxygen-
Heat of formation of CO2 is–94.0K.cal.What would be the quantity of heat liberated, when 3g of graphite is burnt in excess of oxygen-
chemistry-General
physics-
An ideal monoatomic gas is taken around the cycle ABCDA as Shown in the P
V diagram. The work done during the cycle is given by
An ideal monoatomic gas is taken around the cycle ABCDA as Shown in the PV diagram. The work done during the cycle is given by
physics-General
physics-
If for a gas 
, this gas is made up to molecules which are
If for a gas , this gas is made up to molecules which are
physics-General
physics-
For hydrogen gas Cp-CV=a and for oxygen gas Cp-Cv=b, The relation between 
and 
is given by
For hydrogen gas Cp-CV=a and for oxygen gas Cp-Cv=b, The relation between and is given by
physics-General
physics-
Is the cyclic Process Shown on the VP diagram, the magnitude of the work done is
Is the cyclic Process Shown on the VP diagram, the magnitude of the work done is
physics-General
physics-
A gas expands from 1 liter to 3 liter at atmospheric pressure. The work done by the gas is about
A gas expands from 1 liter to 3 liter at atmospheric pressure. The work done by the gas is about
physics-General
physics-
The temperature on Celsius scale is 25°C What is the corresponding temperature on the Fahrenheit Scale?
The temperature on Celsius scale is 25°C What is the corresponding temperature on the Fahrenheit Scale?
physics-General
physics-
The graph AB Shown in figure is a plot of a temperature of a body in degree Fahrenheit than slope, of line AB is
The graph AB Shown in figure is a plot of a temperature of a body in degree Fahrenheit than slope, of line AB is
physics-General
physics-
A difference of temperature of 25°C is equivalent to a difference of
A difference of temperature of 25°C is equivalent to a difference of
physics-General
