0
There is no reaction 'above' in this question
Wiki User
∙ 11y ago
Wiki User
∙ 12y agoexternal heat is absorbed.
Add your answer:
Earn +20 pts
Determine the heat of reaction for these chemical reactions. Are they endo- or exothermic 1. C s H 2 O g CO g H 2. I cant seem to get the same answer twice. Can anyone help me?
C(s) + H2O(g) --> CO(g) + H2(g) I assume this is the reaction you have written. In order to find if the reaction is endo- or exothermic we can use Hess's law to estimate the Heat of reaction. Hess's Law uses the standard heat of formation of the products and reactants in the reaction to determine the heat of reaction. If the heat of reaction is negative then the reaction is exothermic, if it is posititve then the reaction is endothermic. Hrxn = SUM(coefficients*Hf(products)) - SUM(coefficients*Hf(reactants)) The heat of formation of all elements is zero using Hess's law, so all we need is the Hf of water(g) & carbon monoxide (g), which is -241.83 & -110.52 kJ/mol respectively. (You can find these Hf values in most Chemistry of Chemical Engineering Handbooks.) Since the above reaction is stoichiometrically correct we can calculate the Hrxn as follows: Hrxn = {(1)*(0) + (1)*(-110.52 kJ/mol)} - {(1)*(-241.83 kJ/mol)+(1)*(0)} = +131.31 kJ/mol Since the Hrxn is positive the above reaction is endothermic.
Can the combustion reaction CH4 202---CO2 2H2O be classified as a precipitation reaction?
No. Precipitation is the formation of a solid in a solution during a chemical reaction. When the reaction occurs, the solid formed is called the precipitate, and the liquid remaining above the solid is called the supernate. Obviously CH4 + 2O2 = Co2 + 2H2O - in other words 1 methane + 2 oxygen = 1 Carbon Dioxide + 2 water - Does not form a solid in a solution so can not be a precipitation reaction.
What is the reaction of sulfur with oxygen?
This is the balanced equation of the above reaction: S + O2 ---> SO2
Why you use sulfuric acid in the Jaffe reaction?
Jaffe reaction is used to determine creatinine.pH of protein free filtrate must be below 2 because above this pH, some of creatinine is adsorbed onto the protein and is therefore lost.
What of the above reaction?
This cannot be answered. You will have to give me more detail.
Is thermal decomposition a endothermic or exothermic reaction?
Thedecompositionof water is endothermic since energy is required to break up the bonds between the hydrogen and oxygen in the water molecule. Therefore the decomposition of water absorbs energy, making the reaction an endothermic one.
Is everything above the equator in Africa classified as North Africa?
Yes because country's such as ghana, which is in North Africa, is a fraction above the equator
Why is a catalyst written above the arrow in a chemical equation rather than with the reactants?
The enzyme is written above the arrow of the chemical equation because it is involved in the reaction without being changed by it or used up in the reaction. It is not a reactant or a product.
What is the difference between endothermic and exothermic And give examples?
Chemical reactions that release energy in the form of heat, light, or sound are called exothermic reactions. Example: Mixture of sodium and chlorine to yield table salt In other words, combination reactions are exothermic. Reactions that absorb energy or require energy in order to proceed are called endothermic reactions. For example: In the process of photosynthesis, plants use the energy from the sun to convert carbon dioxide and water to glucose and oxygen.
Does lead react with tin nitrate?
No, because tin is above lead in the activity series.
Frequencies above the range audible to humans are classified as?
Ultrasonic
Which career cluster is the above listed occupation classified?
there classes
Determine the heat of reaction for these chemical reactions. Are they endo- or exothermic 1. C s H 2 O g CO g H 2. I cant seem to get the same answer twice. Can anyone help me?
C(s) + H2O(g) --> CO(g) + H2(g) I assume this is the reaction you have written. In order to find if the reaction is endo- or exothermic we can use Hess's law to estimate the Heat of reaction. Hess's Law uses the standard heat of formation of the products and reactants in the reaction to determine the heat of reaction. If the heat of reaction is negative then the reaction is exothermic, if it is posititve then the reaction is endothermic. Hrxn = SUM(coefficients*Hf(products)) - SUM(coefficients*Hf(reactants)) The heat of formation of all elements is zero using Hess's law, so all we need is the Hf of water(g) & carbon monoxide (g), which is -241.83 & -110.52 kJ/mol respectively. (You can find these Hf values in most Chemistry of Chemical Engineering Handbooks.) Since the above reaction is stoichiometrically correct we can calculate the Hrxn as follows: Hrxn = {(1)*(0) + (1)*(-110.52 kJ/mol)} - {(1)*(-241.83 kJ/mol)+(1)*(0)} = +131.31 kJ/mol Since the Hrxn is positive the above reaction is endothermic.
Can the combustion reaction CH4 202---CO2 2H2O be classified as a precipitation reaction?
No. Precipitation is the formation of a solid in a solution during a chemical reaction. When the reaction occurs, the solid formed is called the precipitate, and the liquid remaining above the solid is called the supernate. Obviously CH4 + 2O2 = Co2 + 2H2O - in other words 1 methane + 2 oxygen = 1 Carbon Dioxide + 2 water - Does not form a solid in a solution so can not be a precipitation reaction.
Where is a catalyst written in an equation?
Above the valence arrow.
What is the reaction of sulfur with oxygen?
This is the balanced equation of the above reaction: S + O2 ---> SO2
How many CIA agents are there?
Sorry, that answer is classified and above your pay scale.
