Question

required to raise the lempen U W Problem 2.2 Calculate the amount of heat required to convert 44 g of ice at -54 °C to steam at 141 °C. Construct a graph, label all axes, show melting and boiling points, phase transitions, etc. Show calculations for each segment on the curve. Part II: Hess's Law Questions Problem 3.1 Combine the following thermochemical equations to determine AH at 25°C for: Cgraphite + 2H2(g) → CHAG) Given: Cgraphite + O2(g) + CO2() -393.5 kJ/mol H2(g) + O2(g) → H,00) -285.8 kJ/mol CH4 (0+ 202 (9) + CO2 (g) + 2H2O -890.3 kJ/mol
2.2 and 3.1

Answer 1

9.2 Heat required am, si dT + m, xlfus & m, XS 2X dT2 t. mi xlvap & m, xszxdtz = 144 x 2.06+ (0+54) + 44 *334 + 44 x 4.184 x(100-0) + 44 x 2260 + 48 x 2.03% (141-10) 14899.6 + 14 696 + 18 409.6 + 99 440 + 3662.1 - 14110213 J = 141.1 KJ. 1000 99440 36621) liguid. Temperatung 146967 0e + 18409,63 3.1 C + O₂ 2H2 + -547 48946] heat absorbed. con &H = -393.5 kg/mole 2H2O CH= 2x (285.8) = – 57116 kg/ CHq + 20 AH = + 890.3 kJ/more CO2 + 2H20 C graphite + 2H2 CHA H = (-393.5-57116+ 890:3) - - 74.8 kJ/mole Ans)