Determine the wavelength or the photon. The heat combustion or sucrose (table su

Question

Determine the wavelength or the photon. The heat combustion or sucrose (table sugar) is: C_12H_22O_11(g) + 12 O_2(g) rightarrow 12 CO_2(g) + 11 H_2 O(f) Delta H = -56467 kJ standard Enthalpies of Formation are (in kJ mol) CO_2(g) 393.5 H_2O(I) -285.8 H_2 O (g) How many grams of sucrose are required to produce 5.00 kJ of heat [and H_2 O(I)J? If the hear from the reaction above (50.0 kJ) goes into 700.0 g water at 28.5 degree C. what temperature of the water? calculate Delta H for the reaction [note-. H_2 O(g)]: C_2H_22O_11 (s) 12O_2(g) rightarrow 12 Co_2 (g) 11 H_2O(g) Delta H = ?

Explanation / Answer

Q17

a) mass of sucrose for Q = 5 kJ

HRxn = Hproducts - Hreactants

a)

Q = 5 kJ and HRxn = -5646.7

N = -Q/HRxn = (5/(5646.7)) = 0.0008854729311 mol of sucrose

mass = mol*MW = 0.0008854729311*342.2965 = 0.30309 g of sucrose required

for 0.0008854729311 mol of sucrose, we produce 11:! water

so

0.0008854729311*11 =0.0097402 mol of H2O

mass = mol*Mw = 0.0097402*18 = 0.1753236 g of H2O

b)

Q = 50 kJ

m = 700 g of water Ti = 28.5 C

Q= m*C*(Tf-Ti)

50*10^3 = 700*4.184*(Tf-28.5)

Tf = 50000/(700*4.184) + 28.5

Tf = 45.571 C

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