Which one of the following is not a chemical change ?     A. Burning of coal in airB. Fermentation of sugarcane juiceC. Cracking of petroleumD. Crystallization of table salt from sea water

Q: Using the model below answer the question. Explain: How can products and reactants have different…

A: Endothermic reactions : These are the reactions in which the energy of the final product is more…

Q: How much heat is evolved

A: Since you have posted multiple questions, we are entitled to answer the first only. Please repost…

Q: e shows the number chemical Change C cal Reaction Read of the following state hemical reaction A, b…

A: Types of chemical reaction 1. Chemical combination reaction or synthesis reaction 2. Chemical…

Q: 21. Which of the following reactions releases most energy to the surroundings? *

A: l

Q: How many joules are required to heat 75 grams of water from -85 ˚C to 185˚C?

A: Energy that required to heat water is calculated using the given formula,

Q: Fifty grams of ethyl alcohol is heated from 250°c to 900°c. how much heat was absorbed in the…

A: Mass of ethyl alcohol = 50 grams. Initial temperature = 250 °C  Final temperature = 900 °C  Heat…

Q: A student mixed sodium carbonate and calcium chloride in a test tube. A white solid appeared…

A: Given reactant  Sodium carbonate  Calcium chloride Product  To be determined

Q: What are example of physical change

A: Applying concept of physical change.

Q: I" * Critically discus the term " Heating"

A: A question about the term heating, which is to be accomplished.

Q: Combustion of hydrocarbons such as propane (C,Hg) produces carbon dioxide, a "greenhouse gas."…

A: Burning of Compound in presence of oxygen is called Combustion and products are CO2 gas and H2O…

Q: C. What is the overall temperature change? i °C

A:

Q: Define chemical energy

A: Define chemical energy

Q: Using the balanced equation for the fermentation reaction, calculate for the theoretical amount of…

A: Consider the given information is as follows; Mass of sucrose = 10 g Density of ethanol = 0.79 g/mL…

Q: How are energy and temperature affected as a gas is changing into a liquid? energy is added and…

A: Gas to liquid process is known as condensation . During any change in the state of matter,…

Q: Chemical changes are caused by an input in energy. In physical changes, there is no transfer of…

A:

Q: Calcium metal reacts with water to produce calcium hydroxide and hydrogen gas, releasing 635.1 kJ of…

A: The balanced chemical equation of calcium reacts with water is given as,

Q: is stored energy. O a Potential Energy O b Thermal Energy Kinetic Energy Chemical Energy

A: The right answer is option a) Potential energy

Q: . Reactions that liberate heat are said to be ___________.

A: In Chemistry, there are many chemical reactions that are classified into many sub and main…

Q: describe THE NATURE OF ENERGY

A: Energy is the capacity to do some work. It is the ability to cause change.Energy comes in different…

Q: The First Law of Thermodynamics tells us A) that the energy of the universe is always increasing. B)…

A:

Q: What kind of kinetic energy is most often produced from chemical energy in chemical reactions?

A:

Q: A student modeled the exothermic synthesis reaction that occurs when solid iron and liquid sulfur…

A: The given reaction is exothermic in nature, i.e., it releases heat overall.

Q: What would happen to an objects potential energy as it begins moving?

A: Ans -potential energy would disappear  reason; potential energy  of an object  is being transferred…

Q: Define chemical change.

A: Chemical changes are those changes in which elements combine together to form entirely a new…

Q: Why cannot a chemical change be normally reversed?

A: Matter can exist in three states of matter; solid, liquid and gases. A substance can convert to…

Q: A sample of brass, which has a specific heat contains 200.0 g of water. The brass sample the…

A: Loss of Heat of the Metal brass = Gain of Heat by the Water -Qbrass = Q water Q = mC∆T -mC ∆T for…

Q: E thermochemical equations

A:

Q: e energy change w

A:

Q: [Review Topics] [Reférences] Use the References to access important values if needed for this…

A:

Q: energy during photosynthesis as the plant makes glucose from carbon dioxide and wa energy, which is…

A: We have to tell about the convertion of energy

Q: 13. A student takes 22 grams of an unknown metal places them into a boiling water bath She leaves…

A: Given data mass of metal = 22 g Initial temperature of metal = 100 oC mass of water = 90 g Initial…

Q: only water transferring energy to creating energy in increases endothermic slow down exothermic…

A:

Q: what are some examples of potential energy?

A: Potential energy is the energy held by an object because of its position relative to other objects,…

Q: What are the important cycles of matter?

A: The elements of periodic table are found in different states of matter on earth.  The important…

Q: A helium-filled balloon spontaneously deflates overnight as He atoms diffuse through the wall of the…

A: According to the first law of thermodynamics, There has no change in the system's internal energy as…

Q: A student modeled the exothermic synthesis reaction that occurs when solid iron and liquid sulfur…

A:

Q: An example of using chemical energy is O a walking O b looking at the sun O c running d. eating

A:

Q: What does the Law of Conservation of Energy state?

A: According to this law "energy cannot be created nor destroyed only changed in form" .

Q: Calcium carbonate breaks down into calcium oxide and carbon diox- ide when heated. The products have…

A:

Q: Crushing an automobile at an auto wrecking yard is an example of a chemical change because the car…

A: There are two types of changes in matter physical change and chemical change. When a substance…

Q: an object with high kinetic energy would feel ??? to the touch -cool -rough -warm -smooth

A: Kinetic energy of the object is directly related to the temperature as follows: K.E. = (3/2)KBT…

Q: Kinetic energy is best characterized by O heat transferred from a hot object to a cool one energy…

A: Kinetic energy that is defined as the energy that is associated with particles that are not…

Q: You are asked to study how much table sugar can be mixed or dissolved in water at different…

A: Dissolution can be either an exothermic process or an endothermic process. An exothermic process…

Q: ch heat is

A:

Q: During an endothermic chemical reaction, Select one: O a. a system becomes warmer, and the chemical…

A: The classification of a chemical reaction on the basis of heat or energy transfer: Endothermic…

Q: __________ is defined as energy and ______________ is how this energy is measured. a.…

A: Heat, also referred to as heat energy or thermal energy is a form of energy which is transferred…

Q: noving from a warm object to a cold object reWlts in object nical energy and potential energy are…

A: According to the question we need to determine the true statement.  We know that, Potential energy…

Q: Which statement is true of a chemical change? A. Heat is always exchanged between the system and…

A: Thermodynamics is the branch of chemistry in which we deals for the change in energy or heat, work…

Q: What does the law of conservation of energy state?

A: Anything which has mass and consumes space in surrounding is known as matter. Matter can be present…