nte. (8) Hg(l) Hg(g)_Wordre ay ike (ustom (9) 302(g)+203(g)Dde hytre kystern Mo

Question

nte. (8) Hg(l) Hg(g)_Wordre ay ike (ustom (9) 302(g)+203(g)Dde hytre kystern Mo work doru / (10) CuSO4.5H2O(s) CuSO4(s)+ 5H2O(g) voxliikeapthe guvvel (11) H2(g) + F2(g)+2HF(g)_No_Nov kodhe 12. The combustion of what volume of ethane (C2H6), measured at 23.0°C and 7532 mmHg, would be required to heat 855 g of water from 25.0°C to 98,0°C? a. 2.33L b. 3.20 L c. 4.10L d. 4.7 L 13. Using the Antoine equation, the vapour pressure of tetrohydrofuran at 80°C is estimated to be || 13 torr. Indicate the reference page from Perry's Handbook. rage 13-4 a. 200 b. 1518 1173 d. 2562 14. A quantity of 1.435 of naphthalene (C10H8), was burned in a constant bomb calorimeter. Consequently, the temperature of the water rose from 20.17°C to 25.84°C. If the mass of water

Explanation / Answer

Heat Required to increase the temperature of water = mass * specific heat capacity * change in temperature

=> 855g * 4.186J/gC * (98-25)C

=> 261269.19 J

Molar heat of combustion of ethane

C2H6(g) + O2(g) ------- 2CO2(g) + 3H2O(g)

Heat evolved in the reaction = 1559.7 KJ/mol

number of moles of ethane required = 261.269/1559.7 = 0.1675 moles

Using ideal gas equation

PV = nRT

9.91 * V = 0.1675 * 0.0821 * (273+23)

V = 4.070518/9.91 = 0.4107L

The correct answer must be 0.4107 L

I think the pressure value provided is not correct since 7532 mm Hg will be equivalent to 9.91 atm, it is a mistake and it should be 753.2 mm Hg which will give 4.107L as the final answer

C must be the correct answer

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