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File Paste C Document Wordpad Home View Xcut Copy Clipboard H Calibri 11 A A Biu Abe X X A Fort Paragraph T 1 (111.83 KiB) Viewed 36 times

■ File Paste C Document - WordPad Home View Xcut Copy Clipboard H Calibri 11 A A BIU abe X, X² A··===== Fort Paragraph Type here to search Jan O Find Replace Select all ac Picture Paint Date and Date and Insert drawing time object Insert Editing 12345x+7+ 7. 6.A sample of ethylene glycol, used in car radiators, has a mass of 20 g. The sample gives off 850 J of heat. The initial temperature of the sample is 22.1°C. What is the final temperature? Assume a specific heat capacity of 2.42 1/g*C. (3) 7.It takes 85.0J of energy to raise the temperature of 25 g of pure silicon by 5.0 "C. Calculate the specific heat capacity of pure silicon. (3) 8.What is the enthalpy of neutralization for the following reaction: HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l)? A coffee-cup calorimeter was used to completely neutralize 60.0 mL of 0.5 mol/L HCl(aq) with 42.6 mL of NaOH(aq). The initial temperature of both solutions is 17.8°C. After neutralization, the highest recorded temperature is 21.6°C. Calculate the enthalpy of neutralization, in units of kJ/mol of HCl. Assume that the density of both solutions is 1.00 g/mL. Also assume that the specific heat capacity of both solutions is the same as the specific heat capacity of water (3). 9.Ethoxyethane C4H100 (I) is used as a surgical anaesthetic. It is highly flammable. The standard enthalpy (heat) of formation (AHI) of ethoxy ethane is-59.3 kl/mol. Use standard enthalpies of formation (AH°f) to calculate the AH for the combustion of one mole of ethoxy ethane. Show a complete calculation, including all units. (4) C4H100 (1) +6 02 (g) →4 002 (g) +5H20 (8) AH = ? Ⓒ D 9°C 90% ENG X 3:04 AM 8 5/2/2022