How do you calculate enthalpy change in IB?
How do you calculate enthalpy change in IB?
5.2 Calculation of enthalpy changes Therefore, the change in energy, and so the ΔH value, can be calculated from E = m x c x ΔT where m is the mass of water present (kilograms), and c = 4.18 kJ Kg-1 K-1. The ΔH value can then be calculated back to find the molar enthalpy change for the reaction.
How do I come up with Chem IA ideas?
IB Chemistry IA Ideas
- Investigate chemical equilibria (determine Kc for a reaction).
- Investigate a weak acid-strong base titration (determine the Ka of a weak acid).
- Investigate the enthalpy change of a redox reaction.
- Investigate an aspect of a simple voltaic cell.
- Investigate the Ideal Gas Laws using a data logger.
How long can a chemistry Ia be?
between 6 and 12 pages
The Internal Assessment write-up should be between 6 and 12 pages long. Investigations exceeding this length will be penalized in the communication criterion as lacking in conciseness.
What is enthalpy in IB chemistry?
Enthalpy is the amount of heat energy contained in a substance, which is stored in the chemical bonds. The enthalpy of a substance cannot be measured directly, we can only measure the change in enthalpy. The enthalpy of a substance is comprised out of kinetic and potential energy of its particles.
What is a good IA?
A good IA relies more than anything else on a good starting point: a well-defined, narrow question with some element of a debate. Should allow for a point to be made, or a debate to be settled. It should not lead to a simple narrative. Must be specific – narrow it down as much as you can.
What factors affect the activation energy?
activation energy: The minimum amount of energy that molecules must have in order for a reaction to occur upon collision.
- Reactant Concentrations. Raising the concentrations of reactants makes the reaction happen at a faster rate.
- Surface Area.
- Pressure.
- Temperature.
- Presence or Absence of a Catalyst.
- Nature of the Reactants.
How long should an IA take?
Your paper should follow MLA format which basically means 12-point font, 1-inch margins, double-spacing, and a reasonable font- like this template. The IA experiment and write-up are expected to take a total of 10 hours. There is a 6-12 page limit.
Does the IA need to be double spaced?
5. All IAs should follow a professional and academic format including a reasonable font (12 point), double-spacing, page numbers, section headings, citations, and a works cited page. No other identifying information (name, candidate number) should appear anywhere on your IA.
Is there a word count for Chemistry IA?
The report must not exceed 2,500 words. All the main text is included in the word count, including the research question, analysis, conclusion and evaluation, as well as all annotations over 10 words and any footnotes over 15 words.
