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When ethanol condenses and from the gaseous phase into the liquid phase is this a physical change or chemical change?
physical change- the composition of the ethanol is not effected
What changes in an exothermic chemical change?
In an exothermic chemical reaction, heat is released to the surroundings. This results in an increase in temperature, which can be observed as a rise in temperature of the surroundings. Additionally, the products of the reaction typically have lower energy than the reactants.
What properties can be observed during a chemical reaction?
Some indicators of a chemical reaction are:- change of color- change of odor- release of a gas- change of the temperature- change of the viscosity- formation of a precipitate- change of general appearance- possible explosion- possible chemiluminescence -formation of new compounds
What is volumetric dilatation?
Volumetric dilatation is the increase in volume of a material when it is subjected to a temperature change. This phenomenon occurs due to the expansion or contraction of the material's molecules as the temperature changes. It is commonly observed in substances like liquids, gases, and solids.
What kind of physical evidence might be observed what would indicate that chemical reaction occurred?
Some indicators of a chemical reaction are:- change of color- change of odor- release of a gas- change of the temperature- change of the viscosity- formation of a precipitate- change of general appearance- possible explosion- possible chemiluminescence -formation of new compounds
Is cyclohexane soluble to ethyl alcohol?
yes, at STP, as the change in gibbs free energy is negaitve for all cases. however, the mixing does require heat input to stay isothermal, as heat is required to break the hydrogen bonding of ethanol by cyclohexane
what is the colour change observed when Potassium manganate reacts with ethanol?
Purple colour
Describe an experiment used to find out whether there is any temperature change on mixing ethanol and water?
Measure equal amounts of water and ethanol in separate containers. Take temperature of both. Add ethanol to water and take temperature.
What happens When is bromine is added to cyclohexane?
When bromine is added to cyclohexane, bromination of the cyclohexane molecule may occur. This involves the substitution of a hydrogen atom in the cyclohexane ring with a bromine atom. This reaction can result in the formation of a new compound with bromine substituents on the cyclohexane ring.
Latent heat of ethanol?
Specific heat of ethanol: 2.46 g/mol*degree CSpecific heat is the heat required to raise the temperature of a given mass by 1 degree Celsius.The formula is Q = cmΔTQ = Heat addedc = Specific heatm = MassΔT = Change in temperature
Is state at room temperature a chemical change?
No. It's an observed fact, not a "change" of any sort, chemical or otherwise.
Is there any temperature change on mixing ethanol and water?
No, there is no temperature change when mixing ethanol and water because they form a homogenous solution. The heat released during solvent mixing is offset by the heat absorbed during solvent separation.
How would the yield of ethanol at equilibrium change if the temperature was increased?
If you raise the temperature, the endothermic reaction will increase to use up the extra heat, therefore producing less percentage yield of ethanol and more of ethene and steam.
Does the temperature of a body depend on the frame from which it is observed?
No, the temperature of a body does not depend on the frame from which it is observed. Temperature is an intrinsic property of an object that does not change based on the observer's frame of reference.
When ethanol condenses and from the gaseous phase into the liquid phase is this a physical change or chemical change?
physical change- the composition of the ethanol is not effected
Water and ethanol can be separated by heating the ethanol until it boils away from the water What type of change is this?
This is a physical change because the identity of the substances (water and ethanol) remains the same. The change is reversible, as both water and ethanol can be recovered from the separated mixture.
Is evaporation of ethanol a physical change?
Yes, evaporation, melting, and freezing are all physical changes. For it to be a chemical change, the substance would have to become a different substance. Evaporated ethanol is still ethanol, it is just in gas form.
