INTRO TO CHEMISTRY
INTRO TO CHEMISTRY CHM 1025
Popular in Course
Popular in Chemistry
This 6 page Class Notes was uploaded by Brigitte Wyman on Friday September 18, 2015. The Class Notes belongs to CHM 1025 at University of Florida taught by John Mitchell in Fall. Since its upload, it has received 35 views. For similar materials see /class/207013/chm-1025-university-of-florida in Chemistry at University of Florida.
Reviews for INTRO TO CHEMISTRY
Report this Material
What is Karma?
Karma is the currency of StudySoup.
You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!
Date Created: 09/18/15
Tro Chapter 6 i N P k U Which one of the following is a unit of energy A pascal newton joule watt ampere Chemical energy is A the kinetic energy resulting from violent decomposition of energetic chemicals B the heat energy associated with combustion reactions C the electrical energy produced by fuel cells D the potential energy which resides in chemical bonds E the energy living plants receive from solar radiation How much kinetic energy KE does an object with a mass of 900 g traveling in a straight line with a speed of 40 m s 1 possess A 072 k B 144 k C 288 k D 162 k E 18 k A chemical reaction has just occurred in an insulated isolated system which caused an overall increase in the potential energy of the system Which statement below is true A Heat was taken in from the surroundings by the system B Heat was given off to the surroundings by the system C The temperature of the system increased D The temperature of the system decreased E The total energy of the system increased A 3500 gram sample of copper is initially at 250 0C It absorbs 1250 k of heat from its surroundings What is its final temperature to the nearest tenth of a degree specific heat 03874 I g 1 0C 1 for copper 388 C 672 C 922 C 1172 C 1567 C Page 1 6 gt1 9 9 A calorimeter consists of metal parts with a heat capacity of 9250 J quotC 1 and 1100 grams of oil with a specific heat of 2814 I g 1 OC l What is the heat capacity in joules per degree of the entire assembly A 1321 J 0C 1 B 2028 J 0C 1 C 3703 J 0C 1 D 4020 J 0C 1 E 5698 J 0C 1 A coffee cup calorimeter contains 4800 grams of water at 2500 0C To it are added 3800 grams of water at 535 C 5250 grams of water at 655 C Assuming the heat absorbed by the styrofoam is negligible calculate the expected final temperature The specific heat of water is 4184 I g 1 OC l 382 C 482 C 676 C 887 C 944 C A calorimeter has metal parts heat capacity of 9250 J 0C1 and 1100 grams of oil specific heat 2 2824 I g 1 OC1 both at 2540 0C Adding a 550 g slug at 2200 C caused the temperature to rise to 352 0C Find the specific heat of the metal A 0365 I g 1 0C 1 B 0389 I g 1 0C 1 C 0395 I g 1 0C 1 D 0551 I g 1 0C 1 E 120 J g 1 quotC 1 An exothermic chemical reaction has just occurred in an insulated isolated system Which statement below is true A Heat was taken in from the surroundings by the system B Heat was given off to the surroundings by the system C The potential energy of the system increased D The potential energy of the system decreased E The total energy of the system increased Page 2 10 H H i N Given the reaction 4B 3A gt 4C 7D and some standard enthalpies of formation M I A 157 kl mol 1 B 864 kl mol 1 C 527 kl mol 1 D 7l6 kl mol 1 What is the standard enthalpy of reaction in kl for the reaction shown A 536 kl B 4135 kl C 5156 kl D 8536 kl E 9084 kl The thermochemical equation Which is associated with M1 the standard enthalpy of formation for glucose C5H1205s is A 6Cs 6H20l gt C5H1205s B 6Cs 12 Hg 60g gt C5H1205s C 6Cs 6H2g 3 02g gt C5H1205s D 2C2H50Hl 2C02g gt C5H1205s E 6Cg 6H2g 3 02g gt C5H1205s The standard enthalpy of combustion for xylene C8H10l is 3908 kl mol l Using this data and the standard enthalpies of formation AH H20l 2859 kl mol l COzg 3935 kl mol l calculate the standard enthalpy of formation of C8H10l in kl mol l A 6695 kl B 32286 kl C 32286 kl D 45 874 kl E 84855 kl Page 3 13 H LII 0 Complete combustion of hydrocarbons or compounds With CH and 0 as the only elements gives C02 and H20 as the only products If carried out under standard conditions the C02 is a gas While the H20 is a liquid Given these standard enthalpies of combustion C2H4g 141108 kJ mol 1 C2H2g 129965 kJ mol 1 H2g 28590 kJ mol 1 Cs 39350 kJ mol 1 Calculate the standard enthalpy of reaction for the process C2Hzg Hzg gt C2H4g A l7447 k B 39733 k C 96l47 k D 242483 kJ E 299663 kJ Given the thermochemical equation 2 M205S gt 4 M02s 02g With a standard enthalpy of reaction 2 742 k calculate a value for the standard enthalpy of reaction in the thermochemical reaction 2 M02s 1202g gt M205s Use these reactions and standard enthalpies AHO 2Zb0s 1202g gt 2192033 1280kJ Zb0s 1202g gt 213020 3800 k 2Zb0s 32 02g gt 2192053 3445 k find the value for Zb203s 02g gt Zb205s Using the standard enthalpies of formation M1 H20l 2859 k mol l C2H4g 52284 k mol l C2H50Hl 27763 kJ mol 1 calculate the standard enthalpy of reaction for C2H4g H20l gt C2H50Hl Using the standard enthalpies of formation M I C0g 1105 kJ mol 1 CONH22S 33319 kJ mol 1 mol 1 calculate the standard enthalpy of reaction for C0NH22s H2g gt 2NH3g C0g NH3g 4619 k Page 4 18 6000 ml of 0240 molar perchloric acid HClO4aq was added to a high quality 2 gt9 O insulated calorimeter containing 4000 ml of 0300 molar KOHaq Both solutions have a density of 1000 g ml 1 and a specific heat of 4184 I g 1 0C1 The calorimeter had a heat capacity of 9500 J 0C1 The temperature of the entire system rose from 2530 0C to 2659 0C Calculate the heat of reaction in k per mole of NaOHaq The standard enthalpy of combustion for oxalic acid H2CzO4s is 2519 k mol l Using this data and the standard enthalpies of formation M I H200 2859 kJ mol 1 COzg 3935 kJ mol 1 calculate the standard enthalpy of formation of H2C204S in k mol l Using the standard enthalpies of formation M I NOg 9037 kJ mol 1 NOzg 338 kJ mol 1 SOzg 2969 kJ mol 1 803g 3952 kJ mol 1 calculate the standard enthalpy of reaction for SOzg NOzg gt SOsg NOg Page 5 Answer Key WNQ Sher Nt gtgtOWUWWUUUgtUO 14 371 k 15 2165 k 16 440 k 17 1303 k 18 552 k 19 8210 k 20 417 k Page 6
Are you sure you want to buy this material for
You're already Subscribed!
Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'