Using the Supplemental Data, calculate the standard enthalpy change (in kJ/mol) for each of the following reactions. (a) 2 Na(s) + 1,(9)2 Nal(s) /mol (b) Ni(s) + Cl,(9) - NICI,(s) kJ/mol (c) 2 NaOH(s) + Co,(@) Na,Co,(s) + H,0(9) /mol (d) Cr,03(s) + 3 H,(0) - 2 Cr(s) + 3 H,0() k/mol

A chemist measures the enthalpy change AH during the following reaction: 8 SO,(g) + 16 H,S(9)→3 Sg(s) + 16 H,0() AH=-1863. kJ Use this information to complete the table below. Round each of your answers to the nearest kJ/mol. reaction ΔΗ s, (6) + 4H,0(1) –- 280,(g) + 4H,8(g) 38,(s) + 16H,0(1) → 880, (g) + 16H, S (g) 4S0,(k) + 8H,8(g) -→ s,(.) + 8H,0(1) Explanation Check 72022 McGraw H. MacBook Air esc F2 F3 F5 F4 F6 F7 @ 24 % & 1 4 W R Y *

When 0.670 g of sodium metal is added to an excess of hydrochloric acid, 6970 J of heat are produced. What is the enthalpy of the reaction as written? 2 Na(s) + 2 HCI(aq) 2 NaCI(aq) + H, (g) Enthalpy of reaction: kJ

[Review Topics] [References] Use the References to access important values if needed for this question. Given the standard enthalpy changes for the following two reactions: AH° (1) 2Hg(1) + O2(g) → 2HgO(s) (2) Hg(1) + Cl₂ (g) → HgCl₂ (s) what is the standard enthalpy change for the reaction: = ΔΗ° = ΔΗ° Submit Answer kJ = (3) 2HgCl₂ (s) + O₂(g) → 2HgO(s) + 2Cl₂(g) AH° = ? - 181.6 kJ - 224.3 kJ Retry Entire Group 9 more group attempts remaining

Please answer both questions

A scientist measures the standard enthalpy change for the following reaction to be -351.2 kJ : P,O10(s) + 6 H,O(1)- →4H3PO (aq) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of P¾010(s) is kJ/mol. Submit Answer Retry Entire Group 8 more group attempts remaining

A chemist measures the enthalpy change AH during the following reaction: Sg(s) + 24 F,(g)→8 SF(g) AH=-9672. kJ Use this information to complete the table below. Round each of your answers to the nearest kJ/mol. reaction ΔΗ 10 SSF, (3) → S, (3) + 24F, (z) S,6) + 6F, (g) 2SF, (3) 4 4 SF, (e) -- S,(1) + 4F, (3)

A scientist measures the standard enthalpy change for the following reaction to be 6.7 kJ : CO(g) + H,O(1)–CO;{g) + H2(g) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of CO(g) is kJ/mol.

Given the following reactions and their enthalpies: AH(kJ/mol) H;(g) 2H(g) 20(g) +436 O:(g) +495 H,(g) + 0,(g) → H,O(g) -242 (a) Devise a way to calculate AH for the reaction H,O(g) - 2H(g) + O(g) (b) From this, estimate the H-O bond energy.

Use the standard enthalpy of formation data to find the ΔHo for the following reaction: Cr2O3 (s) + 3 CO (g)  →→ 2 Cr (s)  + 3 CO2 (g) Substance or Ion ΔHfo (kJ/mol) Cr (s) 0 Cr2+ (aq) -138.9 Cr3+ (aq) -1971 Cr2O3 (s) -1128.4 CrO42- (aq) -863.2 Cr2O72- (aq) -1461     C (graphite) 0 C (diamond) 1.896 C (g) 715.0 CO (g) -110.5 CO2 (g) -393.5 CO2 (aq) -412.9 CO32-(aq) -676.26       +846 kJ   -846 kJ   -279 kJ   -1632 kJ   +1632 kJ   +279 kJ   -2641 kJ