I say 'greetings' to those who love chemistry
because I'm finding it so difficult and confusing~
Thanks alot for ur help!
Multiple choice:
Q) Identify the main reason for a change in reaction rate when temperature is increased.
(A) increasing the frequency of molecular collisions
(B) decreasing the activation energy
(C) Increasing molecular kinetic energy
(D) Increasing the activation energy
Written response:
Q) The first ionisation energy of lithium is 519 KJ per mol and that of oxygen is 1310 KJ per mol.
(A) construct an equation to represent the first ionisation of oxygen
(B) identify ONE reason for the difference in above values
(C) relate the ionisation energies to the observed conductivity of lithium and hydrogen in the liquid state
(D) relate the ionisation energies to the type of ions formed by each of the above elements
Q)In the presence of a catalyst such as manganese dioxide, hydrogen peroxide solution decomposes according to the equation:
2H2O2 --> 2H2O2 + O2 (g)
A mixture of mehtane gas and air does not react unless an ignition source such as a flame or a spark is provided
Compare the effect of an ignitino source on the reaction between methane and air to the effect of a catalyst on the decomposition of hydrogen peroxide
Q)The use of nitrogen triiodide is banned in NSW schools because of safety issues. NI3 is unstable, decomposing explosively to form nitrogen gas (N2) and iodine vapour, even when subjected to slight vibrations
With an aid of Lewis electron dot diagrams, explain the exothermic nature of this decomposition of NI3 in terms of energy invovled in the breaking and formation of chemical bonds.
because I'm finding it so difficult and confusing~
Thanks alot for ur help!
Multiple choice:
Q) Identify the main reason for a change in reaction rate when temperature is increased.
(A) increasing the frequency of molecular collisions
(B) decreasing the activation energy
(C) Increasing molecular kinetic energy
(D) Increasing the activation energy
Written response:
Q) The first ionisation energy of lithium is 519 KJ per mol and that of oxygen is 1310 KJ per mol.
(A) construct an equation to represent the first ionisation of oxygen
(B) identify ONE reason for the difference in above values
(C) relate the ionisation energies to the observed conductivity of lithium and hydrogen in the liquid state
(D) relate the ionisation energies to the type of ions formed by each of the above elements
Q)In the presence of a catalyst such as manganese dioxide, hydrogen peroxide solution decomposes according to the equation:
2H2O2 --> 2H2O2 + O2 (g)
A mixture of mehtane gas and air does not react unless an ignition source such as a flame or a spark is provided
Compare the effect of an ignitino source on the reaction between methane and air to the effect of a catalyst on the decomposition of hydrogen peroxide
Q)The use of nitrogen triiodide is banned in NSW schools because of safety issues. NI3 is unstable, decomposing explosively to form nitrogen gas (N2) and iodine vapour, even when subjected to slight vibrations
With an aid of Lewis electron dot diagrams, explain the exothermic nature of this decomposition of NI3 in terms of energy invovled in the breaking and formation of chemical bonds.