Chemistry, 23.06.2020 22:01, alinegonzalez0027
Consider the following intermediate chemical equations. 3 equations. 1: upper C solid plus upper o subscript 2 gas right arrow upper C upper O subscript 2 gas Delta H 1 equals negative 393.5 kilojoules. 2: 2 upper C upper O gas plus upper O subscript 2 gas right arrow 2 upper C upper O subscript 2 gas Delta H 2 equals negative 566.0 kilojoules. 3: 2 upper H subscript 2 upper o gas right arrow 2 upper H subscript 2 gas plus upper O subscript 2 gas delta H 3 equals 483.6 kilojoules. The overall chemical equation is Upper C (s) plus upper H subscript 2 upper O (g) right arrow upper C upper o (g) plus upper H subscript 2 (g).. To calculate the final enthalpy of the overall chemical equation, which step must occur? Reverse the first equation, and change the sign of the enthalpy. Then, add. Reverse the second equation, and change the sign of the enthalpy. Then, add. Multiply the first equation by three, and triple the enthalpy. Then, add. Divide the third equation by two, and double the enthalpy. Then, add.
Answers: 3
Chemistry, 22.06.2019 03:00, Dkhaurithompson
Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture
Answers: 1
Chemistry, 23.06.2019 01:00, carson9373
Wind and moving water provide energy. chemical mechanical thermal none of the above
Answers: 1
Consider the following intermediate chemical equations. 3 equations. 1: upper C solid plus upper o s...
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