Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Transcribed Image Text:2) A- @ when nickel slooly reacts with Oxygen to form nicke I
oxide, the heat
change is -241 KJ/mol of nickel that reacts.
Write the balanced eguatión for the reachion
Change in the equation
with enthalpy
O What is the enthalpy Change
if 16-29 of Nickel (T) OXide is
produced in this manner ?
B - O When gaseous sulfur trioxide
reacts with ageous Sodium
to produce aqeous sodium sulfate and water
is -169.8KL/mol of NaOH that reacts.
hydroxide
the enthalpy change
KJ for the balan ced equation. write the balanced equation
for the reactlon with enthal py change in the equationi
what is the enthalpy Change if 18:79 of S03 is allowed
to react
in this manner?
Aa reacts with water to form
only product. when the reaction occurs
Solid diphosphorus pentoxide
Phosphoric acid as the
the heat change
write the balan ced equation for the reaction with enthalpa
in the equation.
is -226.6Ks for the balanced
equation·
equation
Change
O what amount of BOs, in grams, wou ld need to rea ct with
water inorder to produce 849 KJ Of heat ?
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- 76 of 76 I Review I Constants I Periodic Table Part A Assuming that all the energy given off in the reaction goes to heating up only the air in the house, determine the mass of methane required to heat the air in a house by 15.0 °C. Assume each of the following: house dimensions are 25.0 m x 25.0 m x 2.8 m; specific heat capacity of air is 30 J/K mol; 1.00 mol of air occupies 22.4L for all temperatures concerned. Express your answer using two significant figures. ? g m = Previous Answers Request Answer Submitarrow_forwardcores revie Constants | Periodic Table The standard heat of formation, AH, is defined as the enthalpy change for the formation of one mole of substance from its constituent elements in their earson eText Part B standard states. Thus, elements in their standard states have AH = 0. Heat of formation values can be used Study Area The combustion of heptane, C7H16, 0ccurs via the reaction to calculate the enthalpy change of any reaction. C7H16(g) + 1102(g)→7CO2(g) + 8H2O(g) Document Sharing Consider, for example, the reaction with heat of formation values given by the following table: 2NO(g) + O2(g)= 2NO2(g) AH (kJ/mol) User Settings Substance with heat of formation values given by the following table: C,H16 (g) -187.9 Course Tools Substance (kJ/mol) CO2(g) -393.5 NO(g) H2O(g) -241.8 90.2 O2(g) Calculate the enthalpy for the combustion of 1 mole of heptane. NO2(g) 33.2 Express your answer to four significant figures and include the appropriate units. · View Available Hint(s) Then the…arrow_forward[Review Topics] The overall reaction in commercial heat packs can be represented as 4Fe(8) + 30₂(g) → 2Fe2O3 (8) AH = -1652 kJ a. How much heat is released when 4.44 mol iron is reacted with excess O2? kJ released b. How much heat is released when 1.58 mol Fe2O3 is produced? kl released c. How much heat is released when 1.73 g iron is reacted with excess O2? kJ released d. How much heat is released when 11.1 g Fe and 2.75 g O2 are reacted? Submit Answer kJ released Retry Entire Group [References] 9 more group attempts remaining Previousarrow_forward
- The reaction between sodium metal and chlorine gas produces 822 kJ of heat energy for every chlorine molecule consumed [2Na+Cl2->2NaCl] how much heat is released in kJ if 3.268 g of Na are consumed in the reactionarrow_forwardSolid urea, (NH2)2CO, burns to give CO2,N2, and liquid H2O. Its heat of combustion is -632.2 kJ/mol. Balance the equation for combustion of urea, and calculate the heat generated per mole of H2O formed. (Enter in kJ.)arrow_forwardWhen 56.8 of lead reacts with 3.50 L of oxygen gas, measured at 1.00 atm and 25.0 degrees Celsius, 60.1 kj of heat is released at constant pressure. What is the change in enthalpy at standard condition for the reaction (Please type answer no write by hend)arrow_forward
- How much did our sodium-in-water demonstration raise the temperature of water in the dessicator jar? The reaction we performed was: Na(s) + H2O(l) NaOH(aq) + 1/2H2(g) qreaction = rHo = -184 kJ/mol-rxn Assuming the dessicator jar is well insulated (like our coffee-cup calorimeter), the energy balance is: 0 = qsystem = qreaction + qwater qreaction = -qwater qreaction = -mwater*Cwater*Twater The data from the demonstration was: (a) 1.0 kg water, (b) 22.0oC, (d) Cwater = 4.18 J/g-K, (e) mNa = 0.21 g How many moles of sodium were added to the water (in moles)?arrow_forwardTopics] [References] Use the References to access important values if needed for this question. A scientist measures the standard enthalpy change for the following reaction to be -754.2 kJ: 2CO(g) + 2NO(g) → 2CO2(g) + N₂ (9) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of NO(g) is kJ/mol. $ 4 R Submit Answer F Species AH (kJ/mol) CO₂(g) N₂ (9) 14 V CO(g) %6 5 T G -393.5 0.0 -110.5 Retry Entire Group tv SIA B MacBook Air FO 6 C 9 more group attempts remaining Y H & 7 N F7 U J 8 M DII FO - ( 9 K H lo O I ) O L F10 P A. || : ¡ n F11 Previous + [ command option = 11 1 Next Save and Exit 4) F12 TA delete rearrow_forward
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