Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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- Given the reaction: 4 Fe(s) + 3O2(g) → 2 Fe203(s) A H= -1652 kJ, what is the enthalpy change when 2.00 moles of Fe203 are produced? O 1652 kJ O - 1652 kJ O 826 kJ O - 826 kJarrow_forwardCharcoal is primarily carbon. What mass of CO2 is produced if you burn enough carbon (in the form of charcoal) to produce 4.80 x 10² kJ of heat? The balanced chemical equation is as follows: C(s) + O2 (g) → CO2 (g), Express the mass in grams to three significant figures. VE ΑΣΦ m = ? g AHxn=-393.5 kJarrow_forwardIn the following reaction, how much heat is generated when 3.21 moles of CH4 are burned? CH4 (g) + 2 O2 (g) → CO2 (g) + 2 H2O(g) AH° = -802 kJ/molarrow_forward
- Consider the following reaction carried out under constant pressure 5Cl2(g) + 2P(s) → 2PCl5(g) Δ Hrxn = -749.8 kJCalculate the heat associated with the complete reaction of 84.0 g of Cl2 with 20.6 g of P. -6.15×102 kJ -1.78×102 kJ -4.99×102 kJ -8.88×102 kJ -2.50×102 kJarrow_forwardThe heat of reaction for the combustion of benzene (C6H6) is –3909.9 kJ. 2 C6H6 15 O2 → 12 CO2 + 6 H20 What would be the heat change when 161.54 g of benzene is burned in kilojoules?arrow_forwardHow much heat is produced when 57.4 g of NO2 react? 4NO2(g) + O2(g) → 2N2O5(g) heat of reaction = –110.2 kJarrow_forward
- What is the enthalpy change when 47.6 g Al completely react, given the reaction below? The molar mass of Al = 27.0 g/mol. Fe2O3(s) + 2 Al(s) → Al2O3(s) + 2 Fe(s) ΔH°rxn = -852 kJarrow_forwardHow much heat is produced when 33.9 g of NO2 react? 4NO2(g) + O2(g) → 2N2O5(g) heat of reaction = –110.2 kJarrow_forward*ONLY THE SECOND PART*arrow_forward
- Consider these reactions: Reaction 1: H2 (g) + Cl2 (g) → 2HC1(g) AH = -184.6 kJ Reaction 2: 20F2 (9) → 02 (9) + 2 F2 (9) AH= -49.4 kJ Reaction 3: N2 (g) + 202(g) → 2NO2(g) AH=+66.4 kJ Use Reaction 2. How much energy (in kJ) is released when 61.0 g of oxygen difluoride decomposes? Answer: - kJ (enter a positive value)arrow_forward4. 100.0 mL of a 0.500 M NaOH solution was mixed with 100.0 mL of a 0.500 M HCl solution in a calorimeter. Both the solutions were at the same temperature initially. If the calorimeter constant, KCal, is 55.0 J/oC, determine the heat of the reaction if the temperature goes from 11.0 oC to 38.7 oC. The specific heat of the solution is 4.18 J/g oC. Assume a density of 1.00 g/mL.arrow_forward
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