interpretation an tor a reaction (including phase labels) in which the equation
ID: 1025735 • Letter: I
Question
interpretation an tor a reaction (including phase labels) in which the equation is given a molar interpretation and the equation is called a a Standard equation b. c. State function the enth enthapy of reaction for these molar amounts is written directly after equation d. Thermochemical equation e. None of the above is determined by variables evious history of the 8. A property of a system that depends only on its present state, which such as temperature and pressure and which is independent of any pr system (path) is called a a. Thermodynamic equation b. State function c Enthalpy d. Extensive Property e. Intensive Property 9. The enthalpy, AH, of a reaction can be found by the following equation e. None of the above 10. The principle that for a chemical equation that can be written as the sum of two or more steps the enthalpy change fro the overall equation equals the sum of the enthalpy change for the individual steps is called a. Law of Conservation of Energy b. Thermochemical Equation c. Standard Enthalpy of Formation d. Hess's Law of Heat Summation e. Van der Waal's Equation 1. A device used to measure the heat absorbed or evolved during a physical or chemical change is called a/an a. Sealed tube b. Bomb reactor c. Calorimeter d. Standard reactor e. None of the above The energy of a photon of light which has a frequency of 4.8x 104 /s is a. 6.3 x 10J b. 7.1 x 10-12J C. 4.8 x 10-17 J d. 3.2 x 10-19 J e. 7.2x 1047J Which of the following statements is false regarding the wave nature of light? A wave is a continuously repeating change or oscillation in matter or in a physical field. Electromagnetic radiation includes visible light, X-rays, and radio waves Frequency is defined as the velocity of a wave. Wavelength is the distance between any 2 adjacent peaks or troughs in a wave. a. b. c. . A wave is characterized by its wavelength and frequencyExplanation / Answer
7 ans:- option d is correct i.e thermochemical equation.
# condtions of thermochemical equation
1) in which a balanced chemical equation should be given.
2) phase i.e physical states of all the species of reactants and products should be mentioned.
3) H ^0 i.e standared Change in enthalpy value for the equation must be mentioned with appropriate sign ( i.e reaction is exothermic or endothermic).
4) allotropic form of the elements should be mentioned for a thermochemical equation.
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