Enthalpy h or h - Study guides, Class notes & Summaries

___________ and _________ are inversely proportional; _________ and _______ are directly proportional - frequency and wavelength ; frequency and energy 1st Law of Thermodynamics - delta-U = q + W heat transferred + work done by system on surroundings - W is positive if work is done on the system (by surrounding) - W is negative if work is done by the system A system doing work pushes back on surroundings, it ___________. When surroundings do work, pushes back on system, it _________ . - e...

Energy is neither ____ or ____. It simply ________. Created, destroyed, changes form What are the 2 types of energy? Kinetic, Potential Kinetic Energy (def, @molecular lvl) Energy of Motion; Thermal Energy (heat production through consistent motion) Potential Energy (def, @molecular lvl) Energy of position/configuration, stored energy; Chemical energy is stored Where do electrons have the greatest potential energy? In the outermost electron shells Free energy Amount of energy available to d...

Chemistry Thermochemistry Study Guide Test. The specific heat of iron metal is .450 J/g-K. How many J of heat are necessary to raise the temperature of a 1.05 kg block of iron from 25C to 88.5C? - CORRECT ANSWER (.450) (1050) (63.5) = 30,000.75 J/g How much heat energy, in Joules, is absorbed when 150 grams of water is warmed from 34.8C to 96.3C? - CORRECT ANSWER (150) (4.184) (61.5) = 38,597.4 J/g A chunk of silver has a heat capacity of 42.8J/C. If the silver has a mass of 181 grams...

BIOCHEM FINAL Exam Questions With Verified Answers. What are the four most abundant elements found in living organisms? - answerC, O, H, N. What are the seven moderately abundant elements found in living organisms? - answerMg, Na, Cl, Ca, P, S, K. An Acyl functional group - answer-CO-R An Amido functional group - answer-CO-NH- An Amino functional group - answer-NH A Carbonyl functional group - answer-CO- A Carboxyl functional group - answer-COOH A Phosphoanhydride functional group - an...

Lattice enthalpy The enthalpy change when one mole of an ionic compound is converted to gaseous ions. Enthalpy of atomisation The enthalpy change when one mole of gaseous atoms isformed from the element in its standard state. First electronaffinity The enthalpy change when one mole of gaseous atoms is converted into gaseous ions with a single negative charge. Enthalpy of solution The enthalpy change when one mole of a solute dissolves in water. Enthalpy of hydra...

Practicals Chemistry AQA A-level Rated A+ Required Practical 1 - titration and making a standard solution Making a standard solution 1. weigh the required mass of solid using a sample bottle on a 2 dp balance. 2. transfer the solid into a beaker using distilled water to wash it out- preventing any solid remaining in the sample bottle. 3. reweigh the sample bottle and work out the difference. 4. Add 100cm3 of distilled water to the beaker to dissolve the solid (small volume of water) using a...

AP BIOLOGY EXAM 2024 QUESTIONS AND ANSWERS Water characteristics - Correct Answer ️️ -polar, cohesion (hold together), adhesion (hold to another substance), surface tension, specific heat, heat of vaporization Surface Tension - Correct Answer ️️ -A measure of how difficult it is to stretch or break the surface of a liquid Specific Heat - Correct Answer ️️ -amount of heat absorbed or lost to change temperature by 1C Heat of Vaporization - Correct Answer ️️ -the quantity of ...

Consider ionic compound, MX3, composed of generic metal M and generic gaseous halogen X. Enthalpy of formation of MX3 =-701kJ/mol enthalpy of sublimation of M= 177 kJ/mol 1st, 2nd, and 3rd ionization energies of M=625 kJ/mol, 1583 kJ/mol, and 2469 kJ/mol Electron affinity of X =-315kJ/mol bond energy of X2= 183kJ/mol Determine the lattice energy of MX3 - correct answer lattice energy = -4885 kJ/mol enthalpy of sublimation is -701 bo...

ability to promote change or do work correct answers What is energy? Kinetic, structure, location correct answers _______________ energy is associated with movement; the other type of energy is potential, which is affected by _________________ or _______________. Energy is neither created nor destroyed. correct answers What is the first law of thermodynamics? increase correct answers When the second law of thermodynamics is utilized, the entropy of a system will always _________________...

What determines the 3-D structure of biological molecules and why is it important for function? - ️️Polymers of molecules are able to take on much more complex structures than individual monomers. This structure is determined by the individual parts (functional groups), the type of bond (covalent and noncovalent), and the physical arrangement (structure and stereoisomers) Polymer - polysaccharide (complex carbohydrate) - ️️Monomer - Monosaccharide (simple carbohydrate) Polymer - P...