H. meye ment in Natu molenla and thus it i polan in nature . 11. When someone is injured, responding medical personnel may use either hot packs or cold packs to treat the injuries. These are examples of miniature chemical reactions. Using hot packs and cold packs as anexample, explain the terms endothermic reaction and exothermic reaction. 12. Combustion reactions take place between a fuel and oxygen and produce carbon dioxide and water. Balance the following combustion reaction. OC;H,O + D02 – OCO2 +OH;0 DLNO

Q: Write the overall reaction for the reaction of concentrated sulfuric acid and solid sodium chloride.…

A: Interpretation: We have to write overall reaction.

Q: A tank attached to a grill contains 9 kg of propane (C3H8) which burns to form CO2 and water: C3H8…

A: Given, Mass of propane = 9kg. Mass of propane is converted into moles as follows:

Q: Consider these reactions: Reaction 1: H2 (9) + Cl2 (g) → 2HC1(9) AH=-184.6 kJ %3D Reaction 2: 20F2…

A: ->If ∆H = +ve => reaction is endothermic reaction ->if ∆H = ,-ve => reaction is…

Q: Consider these reactions: Reaction 1: H2 (g) + Cl2 (g) → 2HC1(g) AH = -184.6 kJ Reaction 2: 20F2 (g)…

A: -> If ∆H =+ve => reaction is endothermic reaction. -> if ∆H = -ve => reaction is…

Q: What are the significant concepts about balancing chemical reactions?

A: 1. Balananced chemical equation obeys Law of conservation of mass.  2. Which states that mass is…

Q: Give 2 examples of exothermic and endothermic reactions

A:

Q: We use melting ice and burning woods as Endothermic and exothermic examples. How can you explain and…

A: Water is a higher energy state, as the liquid can rotate and vibrate while solid ice can only…

Q: Classify these reactions as exothermic of endothermic: a. energy + SO2 (g) b. C3H18 (g) + O2 (g) c.…

A: The answer of the above question is given in following steps

Q: Which statement is true about the following reaction? N + He → "O 13.992 4.00 15 16.99 86 + H amu…

A:

Q: Which diagrams are exothermic reactions?

A: The answer to the following question is -

Q: (a) Write the chemical equation for the formation of 1 mole of ethanol from its elements. Include…

A: The elements included in the formation of ethanol are carbon, hydrogen and oxygen.  Carbon is solid…

Q: Consider these reactions, where M represents a generic metal.…

A: Answer:  We have to calculate enthalpy of formation of the given reaction.

Q: Consider these reactions: Reaction 1: H₂(g) + Cl₂(g) 2HCl(g) AH-184.6 kJ Reaction 2: 20F₂(g) O₂(g) +…

A:

Q: Why is it important to give the physical states of the reactants and productswhen giving an equation…

A: While giving the ΔH of the reaction it is important to mention the physical states of the reactants…

Q: oefficients will balance the reaction in the pictured: __Al + ___HCI ---> ___AlCl3 + ___

A: Balancing the equations occurs in such a way that there is an equal number of atoms on both sides.…

Q: Describe the similarities and differences in the energy profiles for exothermic and endothermic…

A: Exothermic reaction are the chemical reactions in which energy is released and Endothermic reactions…

Q: Use the set of three reactions shown below to answer the questions that follow.2NO(g) + O2(g) →…

A: Part 1:Given, mass of NO = 57.4 gMoles of NO can be calculated as:

Q: Consider these reactions, where M represents a generic metal.…

A: In-order to find the enthalpy change of the desired reaction, the given reactions has to be written.…

Q: Calculate AS° (JK- mol) for the reaction SICI4(g) + 2 Mg(s) → 2M9CI2(s) + Si(s) Substance SICIA(g)…

A:

Q: Given

A: XCl4(s) -----> X(s)+2Cl2(g) .......(6)  Sign of ∆H2 changed  ∆H2 = -344.1 kJ

Q: A scientist wants to perform a reaction in a vacuum chamber to control the experiment as much as…

A: Since experiment is performed in the vacuum it means their exist no medium and he wants to determine…

Q: How can you tell if a reaction is endothermic or exothermic from an equation. Please list as many…

A:

Q: Data Table 1: NaHCO, Reaction Data Mass of evaporating dish (g) 47.19919 Mass of evaporating dish +…

A:

Q: If energy is absorbed by the reaction that is taking place, where will the heat be absorbed from?…

A: In such calorimeter, amount of heat released in the reaction or used up in the reaction is…

Q: Use the following reaction to complete the statement: 2 C4H10 + 13 O2 -> 8 CO2 10 H2O 4 moles of…

A: Given reaction is as follows: 2C4H10 + 13O2 → 8CO2 + 10H2O The moles of butane = 4 moles

Q: In this lab various household materials will be dissolved or reacted in order to find if the process…

A: House hold  material  dissolved  in water.

Q: 8CO2(g) + S13N4(s) AH = +461.05 kJ 8CO + 2N20 + 3SIO2 a) Is this reaction exothermic or endothermic?…

A: a.) Type of reaction acb be determined form sign of ∆H of reaction.  b.) The type of reaction can be…

Q: The energy changes in chemical reactions occurs when atoms _____ to form new substances. dissociate…

A:

Q: Why are  combustion reaction important? Give an example.

A: Why are combustion reactions important? Give an example.

Q: Use the given information to determine the enthalpy of the reaction

A:

Q: What is conservation of energy and how does it relate to chemical reactions?

A:

Q: Which of the following are exothermic reactions and which are endothermic? (a) the burning of…

A: •EXOTHERMIC REACTION:- Exothermic reaction are those reactions which produces heat and their…

Q: What is the general class of reaction of potassium cyanide? How much heat must be added or removed…

A:

Q: What does one mean by exothermic and endothermic reactions? Give examples.

A: Exothermic recation is a process in which there is a release of energy from the reaction to the…

Q: In a chemical reaction, the matter is neither created nor destroyed. True or false? Explain how?

A: Law that states mass can neither be created nor destroyed is called law of conservation of mass.…

Q: 4NH3(g) + 5O2(g)4NO(g) +6H2O(g) H = -905 kJ When 4.92 grams of ammonia(g) react with excess…

A: Given reaction:  4NH3(g) + 5O2(g)------> 4NO(g) +6H2O(g)     H = -905 kJ First convert the given…

Q: 2CO2(g) + 5H2(g)→C¿H2(g) + 4H2O(g) AH= 46.5 kJ hen 9.15 grams of carbon dioxide(g) react with excess…

A: CAlculate mole to get value of ∆H

Q: When someone is injured, responding medical personnel may use either hot packs or cold packs to…

A: Cold packs are made up of water and a solid compound usually ammonium nitrate and these both are…

Q: What is an endothermic reaction? What information on the graph above shows that’s the reaction…

A: Endothermic reaction : It is a reaction in which reactant absorbed energy(heat) from its surrounding…

Q: Consider these reactions: Reaction 1: H2(g) + Cl2(g) 2HC1(g) AH = –184.6 kJ Reaction 2: 20F2(g) →…

A: In given question we have three reactions and we need to tell which one of these reaction is…

Q: What is true about an exothermic reaction? 1. The reaction gives off heat and the surroundings cool…

A:

Q: 4. What quantity of heat is evolved with 4.5 mol H2O(I) is formed from the combustion of H2(g) an…

A: The given data : The moles of H2O (l) = 4.5 mol The change in the enthalpy for the given reaction =…

Q: 4 Al (s) + 3O2 (g) → 2 Al2O3 (s) ΔHo = -3351 kJ/mol Consider the following statements about the…

A:

Q: C3H8 + 5O2 → 3CO2 + 4H2O + 2210kJ Classify this reaction as endothermic or exothermic.…

A:

Q: f) An reaction is one that gives off heat. g) The amount of energy required to raise the temperature…

A: " Since you have posted a question with multiple sub-parts , we will solve first three sub-parts for…

Q: PLEASE help me What is an exothermic Reaction? What is an endothermic reaction?

A: Endothermic reaction: In an endothermic reaction , heat is required for the reaction to occur.…

Q: 2. A process that leads to the transformation of one set of chemical substances O Reactants b.…

A: A chemical substance is a type of matter with a constant chemical structure and specific properties.…