Find the change in enthalpy for the imaginary reaction below, given the following imaginary reactions and change in enthalpy values. Give your answer in standard notation to zero decimal places (don't worry about sig figs for this one).   X2Y2 + 5/2 Z2 → 2 XZ2 + Y2Z ΔH = ?   Use: X2Y6 → X2Y2 + 2 Y2 ΔH = 667 kJ Y2Z → Y2 + 1/2 Z2 ΔH = -686 kJ 2 XZ2 + 3 Y2Z → X2Y6 + 7/2 Z2 ΔH = -158 kJ

Could you do question C please

2 NO(g) N2(g) + O2(g)   H = -180.7 kJ 2 NO(g) + O2(g) 2 NO2(g)   H = -113.1 kJ 2 N2O(g) 2 N2(g) + O2(g)   H = -163.2 kJ Use Hess's law to calculate H for the reaction below.3 NO(g) N2O(g) + NO2(g)H = _____k J

What is the change in enthalpy for the reaction: 2B (s) + 3H2(g) → B2H6 (g) given these thermochemical equations? B2H6 (g) + 302 (g) →B2O3 (s) + 3 H₂O (g) AH = -2032 kJ 2B (s) + 3/2 O2 (g) → B2O3 (s) AH = -1272 kJ H2(g) + 1/2 O2 (g) → H2O (g) AH -241.8 kJ -4029 kJ +518.2 kJ +34.6 kJ -3546 kJ

Use the given equations to determine the enthalpy, ΔHrxn, per mole of reaction for the chemical equation below. Report your answer to one decimal place and do not include units.  P4(s) + 6H2(g) + 6O2(g) → 4H3PO3(aq)

1.Given reactions A - C, determine the the change in enthalpy (kJ) for the reaction between C(s) + H2(g).  Do not type units into your answer.   C(graphite) + 2 H2(g) ⟶⟶  CH4(g)     Δ?=?ΔH=?    A.  C(graphite) + O2(g) ⟶⟶  CO2(g)     Δ?=−393.51??ΔH=−393.51kJB.  H2(g) + 1/2 O2(g) ⟶⟶  H2O(l)     Δ?=−285.83??ΔH=−285.83kJC.  CO2(g) + 2 H2O(l) ⟶⟶  CH4(g) + 2 O2(g)     Δ?=890.30??ΔH=890.30kJ       2. Based on your answer to the previous problem, determine the value of q (kJ) if 5.08 grams of methane (CH4) gas is produced from graphite and hydrogen gas.  Do not type units into your answer.

A chemist carefully measures the amount of heat needed to raise the temperature of a 399.0 g sample of a pure substance from 4.1 °C to 19.7°C. The experiment shows that 865. J of heat are needed. What can the chemist report for the specific heat capacity of the substance? Round your answer to 3 significant digits. -1 -1 J.g •K x10 Submit Assignme Continue 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use Privacy Center | Accessibili I IMG-6111.jpg IMG-6110.jpg IMG-6109.jpg IMG-6108.jpg IMG-6107.jpg MacBook Air 80 DII DD F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 @ # $ % & 2 3 4 5 6 7 8 9

Using Enthalpies of formation provided on the exam determine the change in enthalpy (kJ/mol) for the following reaction.  Do not type units into your answer.   CH4(g) + 2 O2(g) ⟶⟶ CO2(g) + 2 H2O(l)     Δ?=?ΔH=?