Is C O2 CO2 a exothermic reaction?
Is C O2 CO2 a exothermic reaction?
It is an exothermic reaction as heat is evolved during the reaction. It is a combination reaction as carbon combines with oxygen to form carbon dioxide. It is a combustion reaction as carbon is burnt in the presence of oxygen.
What is the enthalpy of combustion of carbon to produce carbon monoxide?
The enthalpies of combustion of carbon and carbon monoxide are -390kJmol-1 and -278kJmol-1 respectively.
What does combustion produce?
During complete combustion carbon and hydrogen combine with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O). During incomplete combustion part of the carbon is not completely oxidized producing soot or carbon monoxide (CO).
What is the enthalpy change accompanying the conversion of graphite into diamond?
The enthalpies of combustion of graphite and diamond are 393.5 kj and 395.4 kj respectively. The enthalpies of combustion of graphite and diamond are 393.5 kj and 395.4 kj respectively.
Which of the following value of heat of formation indicates that the product is least stable?
Which of the following values of heat of formation indicates that the product is least stable. Solution : In the formation of a compound, more the heat absorbed, less stable is the compound. Step by step solution by experts to help you in doubt clearance & scoring excellent marks in exams.
What is heat of formation of water?
The chemical reaction for the standard heat of formation per mole of liquid water (standard enthalpy of formation of liquid water) is: H2(g) + ½O2(g) → H2O(l) If you looked up the standard enthalpy of formation of liquid water in tables (at 25°C and 1 atm), the value would be given as: ΔHfo = -285.8 kJ mol-1.
Which of the following equations is the definition of enthalpy?
In symbols, the enthalpy, H, equals the sum of the internal energy, E, and the product of the pressure, P, and volume, V, of the system: H = E + PV.
Which of the following equations is a mathematical definition for enthalpy?
Enthalpy is usually expressed as the change in enthalpy (ΔH) for a process between initial and final states: ΔH=ΔU+ΔPV. If temperature and pressure remain constant through the process and the work is limited to pressure-volume work, then the enthalpy change is given by the equation: ΔH=ΔU+PΔV.
Which of the following reactions corresponds to the definition of enthalpy of formation at 298K?
Which of the following equations corresponds to the enthalpy of combustion at 298K? Solution : Combustion of one mole of reactants gives products in standard state or most stable state.
Which of the following equation represent standard heat of formation?
Introduction. The standard enthalpy of formation is a measure of the energy released or consumed when one mole of a substance is created under standard conditions from its pure elements. The symbol of the standard enthalpy of formation is ΔH f. = A degree signifies that it’s a standard enthalpy change.
Which of the following is the standard state of iodine at 298 Kelvin?
Basic Information
| Name | Iodine |
|---|---|
| Symbol | I |
| Atomic number | 53 |
| Atomic weight | 126.9 amu |
| Standard state | Solid at 298 K |
What is iodine named after?
Periodic Table app
| Discovery date | 1811 |
|---|---|
| Discovered by | Bernard Courtois |
| Origin of the name | The name is derived from the Greek ‘iodes’ meaning violet. |
| Allotropes | I2 |
What is the cost of iodine?
| Name | Iodine |
|---|---|
| Normal Phase | Solid |
| Family | Halogens |
| Period | 5 |
| Cost | $8.30 per 100 grams |
What is iodine Colour?
Iodine is a nonmetallic, nearly black solid at room temperature and has a glittering crystalline appearance.
What Colour is iodine if there is no starch present?
Starch Test: Add Iodine-KI reagent to a solution or directly on a potato or other materials such as bread, crackers, or flour. A blue-black color results if starch is present. If starch amylose is not present, then the color will stay orange or yellow.
Is iodine purple or yellow?
Solid iodine is a deep purple colour. Iodine vapour and solutions of iodine in nonpolar solvents are also purple. Aqueous iodine solutions, however, have a yellow-orange colour, because of the formation of a charge transfer complex.
What Colour is iodine water?
A solution of iodine (I2) and potassium iodide (KI) in water has a light orange-brown color. If it is added to a sample that contains starch, such as the bread pictured above, the color changes to a deep blue.
What is Colour of bromine?
reddish brown
What is the formula of bromine?
Bromine
| PubChem CID | 24408 |
|---|---|
| Molecular Formula | Br2 |
| Synonyms | 7726-95-6 Br Bromine Dibromine Brom More… |
| Molecular Weight | 159.81 g/mol |
| Dates | Modify Create /td> |
Which element of the following is most similar to bromine?
Fluorine