A Given below are the reaction and the standard enthalpy change of formation values: SiHAg) + 2 02(g) → SiOzs) + 2 H20m AHan= -1,516.8 kJ AH'f (kJ/mol) Sio2(s) H20(1) -910.9 -285.8 What is the AH°f for SiH4(g)? Select one: O a. 320.1 kJ/mol Ob. 34.3 kJ/mol Oc. -34.3 kJ/mol Od. -320.1 kJ/mol В Consider the standard molar entropies of the following compounds: S*†(J/mol-K) (CH3)2N2H2 0 200.25 N2040) 209.2 191.5 188.7 H20M 69.91 CO2(9) 213.6 Calculate the value of ASxn for the reaction below: (CH3)2N2H21) + 2N204) → 3N2{g) + 4H20ig} + 2C02(g) Select one: O a. -1137.9 J/(mol·K) O b. -184.4 J/{mol·K) Oc. +184.4 J/(mol-K) O d. +1137.9 J/{mol-K)
A Given below are the reaction and the standard enthalpy change of formation values: SiHAg) + 2 02(g) → SiOzs) + 2 H20m AHan= -1,516.8 kJ AH'f (kJ/mol) Sio2(s) H20(1) -910.9 -285.8 What is the AH°f for SiH4(g)? Select one: O a. 320.1 kJ/mol Ob. 34.3 kJ/mol Oc. -34.3 kJ/mol Od. -320.1 kJ/mol В Consider the standard molar entropies of the following compounds: S*†(J/mol-K) (CH3)2N2H2 0 200.25 N2040) 209.2 191.5 188.7 H20M 69.91 CO2(9) 213.6 Calculate the value of ASxn for the reaction below: (CH3)2N2H21) + 2N204) → 3N2{g) + 4H20ig} + 2C02(g) Select one: O a. -1137.9 J/(mol·K) O b. -184.4 J/{mol·K) Oc. +184.4 J/(mol-K) O d. +1137.9 J/{mol-K)
Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter5: Principles Of Chemical Reactivity: Energy And Chemical Reactions
Section: Chapter Questions
Problem 103SCQ: You want to determine the value for the enthalpy of formation of CaSO4(s), but the reaction cannot...
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HI! I need help on these two questions, A and B. Thank u!
Transcribed Image Text:A
Given below are the reaction and the standard enthalpy change of formation values:
SiHg) + 2 02(g) → SiO2fs) + 2 H20m AHan= -1,516.8 kJ
AH°F (kJ/mol)
Sio2(s)
-910.9
H20(1)
-285.8
What is the AH°f for SiHa(g)?
Select one:
Oa.
320.1 kJ/mol
O b. 34.3 kJ/mol
O c. -34.3 kJ/mol
O d. -320.1 kJ/mol
В
Consider the standard molar entropies of the following compounds:
S'f (J/mol-K)
(CH3)2N2H2 ) 200.25
N2040)
209.2
N2(g)
191.5
H20(g)
188.7
H20m
69.91
CO2(g)
213.6
Calculate the value of ASXN for the reaction below:
(CH3)2N2H21) + 2N20«(1) → 3N2(g) + 4H20(g) + 2C02(g)
Select one:
O a. -1137.9 J/(mol-K)
O b. -184.4 J/(mol-K)
O c. +184.4 J/(mol-K)
O d. +1137.9 J/(mol-K)
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