Question

Please help with these two questions :(

1. How much energy (in kJ) is evolved during the reaction of 76.9 g of Al, according to the reaction below?

Fe₂O₃(s) + 2 Al(s) → Al₂O₃(s) + 2 Fe(s) ΔH°_rxn = -852 kJ

Assume that there is excess Fe₂O₃.

2. A 12.43 g sample of ethanol (C₂H₅OH) is burned in a bomb calorimeter with a heat capacity, C = 5.65 kJ/°C.

C₂H₅OH(l) + 3 O₂(g) → 2 CO₂(g) + 3 H₂O(g) ΔH°_rxn = -1235 kJ

If the initial temperature is 25.0°C, what is the final temperature (in °C) of the calorimeter?

The molar mass of ethanol is 46.07 g/mol.

QUESTION 3 How much energy (in kJ) is evolved during the reaction of 76.9 g of Al, according to the reaction below? Fe2O3(s) + 2 Al(s) → Al2O3(s) + 2 Fe(s) AH°rxn = -852 kJ Assume that there is excess Fe2O3. (The direction of flow is given by the word evolved, therefore you can enter the magnitude of the value without a sign). QUESTION 4 A 12.43 g sample of ethanol (C2H5OH) is burned in a bomb calorimeter with a heat capacity, C = 5.65 kJ/°C. C2H5OH(1) + 3 O2(g) → 2 CO2(g) + 3 H2O(g) AH°rxn = -1235 kJ If the initial temperature is 25.0°C, what is the final temperature (in °C) of the calorimeter? The molar mass of ethanol is 46.07 g/mol.

Answer 1

(6) &, 0, (s) + 2 AL (s) - A8, 03 (5) +2 Rs) ди, 2 - #S2 ET from well balanced egn & star value, we know- 2 mole of Al releases 852 KJ of energy | || te ( ах2), Р. А. eleo RS2 ET од емец : 26-4 од wu rlease | 82 x26-9 ) кг 2х2 + 1a13.51 КТ елли 84 Answer is [ 1213.31 KO) Kindly Submit Please Different Rate ... Question seperately