1)Given the thermochemical equation for photosynthesis,6H 2 O( l ) + 6CO 2 ( g )
ID: 104743 • Letter: 1
Question
1)Given the thermochemical equation for photosynthesis,6H2O(l) + 6CO2(g)C6H12O6(s) + 6O2(g) H = +2803 kJ/mol Calculate the solar energy required to produce 1991 g of C6H12O6. Enter your answer in scientific notation.
2)Consider the reaction H2(g) + Cl2(g) 2HCl(g) H = 184.6 kJ/mol If 7.0 moles of H2 reacts with 7.0 moles of Cl2 to form HCl at 1.0 atm, what is U for this reaction? Assume the reaction goes to completion and V = 0 L.(The conversion factor is 1 L *atm = 101.3 J.). Answer in kJ
3)A 56.0g sample of an unknown metal at 99°C was placed in a constant-pressure calorimeter containing 70.0 g of water at 24.0°C. The final temperature of the system was found to be 28.4°C. Calculate the specific heat of the metal. (The heat capacity of the calorimeter is 11.4 J/°C.)
Explanation / Answer
1.
moles of C6H12O6 = 1991 g x 1 mol / 180.1 g
= 11.05 mol
The energy is calculated as shown below:
+2803 kJ/mol x 11.05 mol = 3.097x 10^4 kJ
As per chegg guidelines, first question is answered.
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