Answer questions from number 2 (a and b), number 3, number 4, number 5 (a and b), number 6 4Gılll Gilll00:21* 67%f [Template] Mo... /Answer the following problems:1. Two solid objects, A and B, are placed in boiling water and allowed to come tothe temperature of the water. Each is then lifted out and placed in separatebeakers containing 1000 g of water at 10.0 °C. Object A increases the watertemperature by 3.50 °C; B increases the water temperature by 2.60 C.a. Which object has the larger heat capacity?b. What can you say about the specific heats of A and B?2. The specific heat of octane, CsHss0), is 2.22 Jig-K.a. How many J of heat are needed to raise the temperature of 80.0 g ofoctane from 10.0 to 25.0 °C?b. Which will require more heat, increasing the temperature of 1 mol ofCH18, by a certain amount or increasing the temperature of 1 mol ofHOm by the same amount?3. Calculate the enthalpy change for the reactionP.0a (4) + 2 02 (0) - P,010(5)given the following enthalpies of reaction:AH = -1640.1 k)Pa (s) + 302 (9) - P,0.4)Pa (s) + 5 02 (9) - P,010 (9)AH = -2940.1 k)4. From the enthalpies of reactionH2 (9) + F2 (0) - 2 HF)C9 +2 F2 (0) - CF. (6)2 C) +2 H2 (0) - CHa (0)AH = -537 k)AH = -680 k/AH = +52.3 k)calculate AH for the reaction of ethylene with F2:12THERMOCHEMISTRY...CH4 (9) + 6 F2 (9) + 2 CF, () + 4 HF)5. Gasoline is composed primarily of hydrocarbons, including many with eightcarbon atoms, called octanes. One of the deanest-buming octanes is acompound called 2,3,4- trimethylpentane, which has the following structuralformula:сн, сн, сн,H;C-CH-CH-CH-CH,The complete combustion of one mole of this compound to COzig and H2Ogleads to AH° = -5064.9 k).a. Write a balanced equation for the combustion of 1 mol of CaH18n.b. By using the information in this problem and data in the thermodynamicproperties table, calculate AH for 2,3,4-trimethylpentane.6. The following is known as the thermite reaction:2 Alg + Fe,0s(4) - Al,03(9) + 2 Feg)This highly exothermic reaction is used for welding massive units, such as propellers forlarge ships. Using standard enthalpies of formation, calculate AH° for this reaction.I hope you'll enjoy the taskAnswer Key

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Answer the following problems: 1. Two solid objects, A and B, are placed in boiling water and allowed to come to the temperature of the water. Each is then lifted out and placed in separate beakers containing 1000 g of water at 10.0 °C. Object A increases the water temperature by 3.50 °C; B increases the water temperature by 2.60 "C. a. Which object has the larger heat capacity? b. What can you say about the specific heats of A and B? 2. The specific heat of octane, CaHsan, is 2.22 Jig-K. a. How many J of heat are needed to raise the temperature of 80.0 g of octane from 10.0 to 25.0 °C? b. Which will require more heat, increasing the temperature of 1 mol of CHran by a certain amount or increasing the temperature of 1 mol of HO, by the same amount? 3. Calculate the enthaipy change for the reaction P.Os () + 2 0z ) - P.0:015) given the following enthalpies of reaction: Pa +3 0z6) - P,0,au) Pac +5 0z - P,0,a 6) AH = -1640.1 k) AH = -2940.1 k) 4. From the enthalpies of reaction AH = -537 k) Hz + F2 - 2 HFa C +2 Fa) - CF 2C +2 H2 ) - C,Ha) AH = -680 k AH = +523 k) calculate AH for the reaction of ethylene with F: 12 THERMOCHEMISTRY C,H. ) +6 F6) - 2CF. + 4 HF 5. Gasoline is composed primarily of hydrocarbons, including many with eight carbon atoms, called octanes. One of the deanest-buming octanes is a compound called 2,3,4- trimethylpentane, which has the following structural formula: CH, CH, CH, HC-CH-CH-CH-CH, The complete combustion of ane mole of this compound to COng and H,O leads to AH = -5064.9 k). a Write a balanced equation for the combustion of 1 mol of CeHisn. b. By using the information in this problem and data in the thermodynamic properties table, calculate AH; for 2.3,4-trimethylpentane. 6. The following is known as the thermite reaction: 2 Al + Fe,0,u) - Al,0,c1) + 2 Fes) This highly exothermic reaction is used for welding massive units, such as propellers for large ships. Using standard enthalpies of formation, calculate AH for this reaction.