0
What else can I help you with?
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.
What does the symbol o written above a reaction arrow mean?
The symbol o written above a reaction arrow indicates that the reaction is carried out under an oxygen atmosphere.
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 does the compound above the arrow mean?
The compound above the arrow in a chemical reaction signifies the catalyst or condition used to facilitate the reaction. It indicates that the reaction requires the presence of that specific compound to proceed or to increase the speed of the reaction.
What does manganese above an arrow in a formula equation mean?
Manganese (Mn) above an arrow in a chemical equation typically means that the element is a catalyst for the reaction. This indicates that manganese is involved in the reaction mechanism, but is not consumed in the overall reaction and is regenerated at the end.
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.
Why is energy written above the arrow?
Energy is often written above the arrow in chemical reactions to indicate whether a reaction is endothermic (energy is absorbed) or exothermic (energy is released). This notation helps to show the overall energy change during the reaction.
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?
A catalyst is written above the arrow in a chemical equation to show that it is not consumed in the reaction and thus does not appear in the overall stoichiometry of the reaction. This means that it does not take part in the reaction as a reactant or a product, but it still helps in speeding up the reaction. Placing it above the arrow helps to distinguish it from other reactants or products.
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.
When a cold pack is squeezed why does it feel cool to the touch?
When you activate the cold pack, you start an endothermic (heat-absorbing) process* inside it. This drops the temperature to just above freezing. The immediately surrounding air will cool down by conduction and convection. *The process is typically the dissolution of ammonium nitrate (fertilizer) in water
What does the symbol o written above a reaction arrow mean?
The symbol o written above a reaction arrow indicates that the reaction is carried out under an oxygen atmosphere.
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.
Which chemical reaction does the enthalpy diagram above represent?
I'm unable to view images or diagrams, so I cannot directly identify the chemical reaction represented in the enthalpy diagram you mentioned. However, enthalpy diagrams typically illustrate exothermic or endothermic reactions by showing changes in enthalpy during the reaction process. If you describe the key features of the diagram, such as whether the products are at a lower or higher energy level than the reactants, I can help you identify the type of reaction it represents.
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.
Frequencies above the range audible to humans are classified as?
Ultrasonic
Which career cluster is the above listed occupation classified?
there classes
