Activation energy (E ) and enthalpy of reaction(ΔH) for reaction A → B are 80 kJ mol and–20 KJ mol respectively. On adding catalystactivation energy decreases to 70 KJ mol thenenthalpy of reaction in presence of catalyst is :

For a one step reaction, the activation energy for the forward reaction is 40.0 kJ mol-1, and the enthalpy of reaction is -20.0 kJ mol-1.  Which statement below is true?Question 2Select one:a.The addition of a catalyst will produce a change in magnitude of the activation energy which is greater for the forward reaction than the reverse reaction.b.The value for the enthalpy of reaction would be decreased by addition of a catalyst.c.The reaction is endothermic.d.The reverse reaction is slower than the forward reaction (smaller rate constant).e.The reaction rate would be decreased by an increase in temperature.

adding a catalyst increases the rate of reaction byA same reaction pathway and higher activation energyB providing an alternate pathway with lower activation energyC same reaction pathway and lower activation energyD providing an alternate pathway with higher activation

The activation energy of a chemical reaction is the energy that:Group of answer choicesinitiates the reaction. activates the catalyst.is the difference in the energies of the starting materials and products.must be released from the mixture.must be removed from the mixture.

In a reaction, the ΔΗ of the reaction was (100 KJ), When a catalyst was used, the activation energy of the reaction decreased by 40 KJ, if the activation energy of forward without catalyst was 280, so the activation energy of the reverse catalytic reaction was…………...

Adding a catalyst increases the reaction rate by...