Enthaply change - Study guides, Class notes & Summaries

15 kg/s of air are compressed from 1 atm and 300K (enthalpy of 300.19 kJ/kg) to 2 atm and 900K (enthalpy of 732.93 kJ/kg). Heat transfer is negligible. The air compressor's power output is most nearly (A) 5.6 MW (B) 6.5 MW (C) 7.6 MW (D) 8.9 MW - answer-B What is most nearly the weight in lbf if a 1.00lbm object in a gravitational field of 27.5ft/s^2? (A) 0.85lbf (B) 1.2lbf (C) 28lbf (D) 32lbf - answer-A A rocket that has a mass of 4000 lbm travels at 27,000 ft/sec. What is mo...

Define Thermochemistry - correct answer the study of energy changes that occur during a chemical reaction and changes in the state Define energy - correct answer the ability to work or produce heat Define temperature - correct answer a measure of the amount of kinetic energy an object/substance has measured in C or K Define Heat - correct answer thermal energy- energy that transfers from one object to another measured in joules (q) transfers because of difference...

AQA A LEVEL CHEMISTRY EXAM 2024 mean bond enthalpy - ANSWER-The energy required to break a covalent bond into gaseous atoms averaged over different molecules Bonds broken - bonds made activation energy - ANSWER-The minimum amount of energy needed to start a chemical reaction catalyst - ANSWER-A substance that increases the rate of a chemical reaction without being changed by providing an alternative reaction pathway by lowering activation energy Le Chatelie...

first ionization energy : The energy required to convert one mole of gaseous atoms into gaseous atoms with a single positive charge standard enthalpy of formation : the enthalpy change when 1 mole of a compound is formed from its elements in their standard states under standard conditions Standard Enthalpy of Atomisation : The enthalpy change when one mole of gaseous atoms is formed from an element in its standard state Lattice enthalpy : The enthalpy change that occurs when one mol...

Notes contain syllabus contents for chapter chemical energetics for A2 level 9701

Colourful, handwritten lecture notes on thermodynamics. Covering the laws of thermodynamics,spontaneous change, entropy, enthalpy, microstates, entropy change of the universe, Gibbs free energy, and work.