4.78 x 10 kJ E) 1,040 kJ 51.Methanol (CH,OH) burns according to the equation 2CH,OH(I) + 30:(g)→2CO2(g) + 4H,O(1), AH n =-1454 kJ/mol. How much heat, in kilojoules, is given off when 75.0 g of methanol is burned? 727 kJ A) B) C) D) E) 3.22 x 10' kJ 1.45 x 10 kJ 1.70 x 10 kJ 3.41 x 10' kJ 52.Calcium oxide and water react in an exothermic reaction: CaO(s) + H,O(I)→Ca(OH):(s) AH°n =-64.8 kJ/mol How much heat would be liberated when 7.15 g CaO(s) is dropped into a beaker containing 152g Н.О? 1.97 x 10 kJ A) B) C) D) 8.26 kJ 508 kJ 547 kJ Page 11

4.78 x 10 kJ E) 1,040 kJ 51.Methanol (CH,OH) burns according to the equation 2CH,OH(I) + 30:(g)→2CO2(g) + 4H,O(1), AH n =-1454 kJ/mol. How much heat, in kilojoules, is given off when 75.0 g of methanol is burned? 727 kJ A) B) C) D) E) 3.22 x 10' kJ 1.45 x 10 kJ 1.70 x 10 kJ 3.41 x 10' kJ 52.Calcium oxide and water react in an exothermic reaction: CaO(s) + H,O(I)→Ca(OH):(s) AH°n =-64.8 kJ/mol How much heat would be liberated when 7.15 g CaO(s) is dropped into a beaker containing 152g Н.О? 1.97 x 10 kJ A) B) C) D) 8.26 kJ 508 kJ 547 kJ Page 11

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

i need help on this question
A chemist measures the energy change AH during the following reaction: 2 HgO(s) → 2 Hg(1)+O₂(g) Use the information to answer the following questions. This reaction is... ΔΗ= 182. kJ Suppose 35.5 g of HgO react. Will any heat be released or absorbed? If you said heat will be released or absorbed in the second part of this question, calculate how much heat will be released or absorbed. Be sure your answer has the correct number of significant digits. endothermic. exothermic. Yes, absorbed. Yes, released. No. KJ x10 Ś
2) Calculate the enthalpy of formation of carbon dioxide using the following information: _C(s) +O₂ (g) →_CO₂(g) 2C(s) + O₂(g) → 2CO(g) AH= -221.0 kJ/mol CO(g) + O₂(g) → CO(g) AH- -283.0 kJ/mol
2 Calculate the temperature reached when 100 g of water at 18.2°C absorbs 9.45 kJ of heat energy. The specific heat capacity of water is 4.18 J g-¹°C-1.
In the following reaction, how much heat is generated when 3.27 moles of CH4 are burned? CH: (g) + 2 O2 (g) → CO2 (g) + 2 H2O(g) AH° = -802 kJ/mol pis -2622.54 kJ 1 3 4 5 C 7 8 +/- х 100 CO 2.
9
Calculate the heat exchanged when 32.0 g oxygen reacts with 16.0 g methane: CH4(g) + 3/2 O2(g) → CO2(g) +2H2O(l) qrx= -900 kj
2. Mercury (II) oxide is a reddish mineral that is used as the cathode in mercury batteries. It is also used to obtain pure mercury since it will decompose according to the equation: Ozig) 2 HgO(s) + 181.4 kJ -> 2 Hg(s) What amount of heat would be required for the formation of 325 g of pure mercury? N
187 g 662g 44.Given that CaO(s) + H,O(1) Ca(OH)2(s), AH°, =-64.8 kJ/mol, how many grams of CaO must rxn react in order to liberate 525 kJ of heat? 6.92 g 56.1 g 455g 606 g 3.40 x 10 g 45.The combustion of pentane produces heat according to the equation AH°r-3,510 kJ/mol C;H12(1) + 80(g)5CO:(g)+ 6H,O(1) How many grams of CO, are produced per 2.50 x 10' kJ of heat released? 0.0809g 3.56g 31.3g 157 g 309g in Colorado requi per month, How res 20. GJ of heat
Q1
Consider the reaction B₂H6(g) + 3 O2(g) → B2O3(s) + 3 H₂O(g) AH = -2035 kJ/mol Calculate the amount of heat released when 80.2 g of diborane is burned. heat released = kJ
61. Consider the thermochemical equation for the combustion of acetone (CH,O), the main ingredient in nail polish remover: C;H,O(l) + 4 O,(g) 3 CO2(g) + 3 H,O(g) A,H° = -1790 kJ mol If a bottle of nail polish remover contains 177 mL of acetone, how much heat is released by its complete combustion? The density of acetone is 0.788 g mL.