We use melting ice and burning woods as Endothermic and exothermic examples. How can you explain and how did it happen?

Q: What are the basic concepts of a calorimeter?

A: The basic concepts of a calorimeter should be written.

Q: A 7.37 g sample of an unknown salt (MM = 116.82 g/mol) is dissolved in 150.00 g water in a coffee…

A:

Q: What would likely happen if you were to touch the flask in which an endothermic reaction was…

A: The reactions in which enegry is absorbed are known as endothermic reactions.

Q: What is the specific heat of tin if a 55.0-g sample absorbs 982 J of heat to raise its temperature…

A:

Q: Consider the vaporization of liquid water to steam at a pressure of 1 atm. (a) Is this process…

A: Vaporization is defined as the process in which liquid state is converted into the vapour state. As…

Q: 4.33g sample of an unknown salt (MM=116.83g/mol) is dissolved in 150.00g water coffee cup…

A:

Q: (Calorimetry)

A:

Q: A 7.03 g sample of an unknown salt (MM = 116.82 g/mol) is dissolved in 150.00 g water in a coffee…

A: We know during the process of any reaction, heat gained  = heat lost . For above the formula used…

Q: Which of the following changes is endothermic? * O melting of copper O freezing of water O…

A: In endothermic reactions, ∆H is positive and heat or energy is absorbed.

Q: Two yellow substances are mixed in a flask. The flask then feels warm. This is an example of what…

A:

Q: 175 g of water was heated from 15°C to 88°C.  How many kilocalories (kcal) of heat were absorbed by…

A:

Q: 1. An exothermic reaction is taking place in a test tube , what would you expect to feel when you…

A: An exothermic reaction is a type of chemical reaction in which energy is released into the…

Q: When a 1.25 kg sample of water was heated in a kettle, its temperature increased from 16.4°C to…

A: Given: Mass of water = 1.25 Kg = 1250 g.                                         (Since 1 Kg = 1000…

Q: QUESTION 18 Which of the following processes is endothermic? the combustion of propane the chemical…

A: Endothermic process involves the absorption of energy during conversion of reactants into products.

Q: What is the specific heat of 54.8 g of a substance that releases 445 Joules of heat upon cooling…

A: q = mc∆T  q is the amount of heat energy released m is the mass of substance  c is the specific heat…

Q: A 217.3 g water bath is heated to 99.7 ˚C from 22.5 ˚C.  How much heat was absorbed by the water, in…

A: Given, mass of water =217.3 g initial temperature, Ti=22.5 °C final temperature, Tf=99.7°C specific…

Q: Section 5.8 Energy and Reactions 10. In hot weather dogs pant and humans sweat. Is the panting…

A: Given: In hot weather dogs pant and humans sweat. To explain: Is the panting process which dogs'…

Q: A student places a block of hot metal into a coffee cup calorimeter containing 151.0 g of water. The…

A: Given data,Mass of water=151.0gInitial temperature of water=23.3oCFinal temperature of…

Q: Sodium sulfate and a blue solid known as copper(II) hydroxide, form when a solution of copper(II)…

A:

Q: Explain how the high specific heat capacity of water can affect the weather in coastal regions.

A: Specific heat capacity is the amount of heat change in bringing one degree (Celsius or Kelvin)…

Q: A new alloy is designed for use in a car radiator. If the 17.6 kg radiator required 8.69 × 105 J of…

A:

Q: Which sample is most likely to undergo the smallest change in temperature upon the absorption of 100…

A:

Q: How much heat is required to raise the temperature of 125 grams of water by 10.0 degrees C?

A: Answer The quantity of heat required to raise the temperature of 125 g of water by 10.0°C is 5230 J.…

Q: How much heat will be released a 4.5 g of CH4 is burned. H= -802kJ/mol

A: Given data,  Mass of CH4 is burned = 4.5 g  Enthalpy , H = - 802 KJ/mol  Molar mass of CH4 = {12 +(4…

Q: How much heat is released when 1.4 moles of hydrogen fluoride are produced? H2 (g) + F2 (g) → 2HF…

A:

Q: how to know if a final reaction is endothermic or exothermic?

A: To know the final reaction is exothermic or endothermic.  1) Thermodynamic analysis :- For an…

Q: 5. If you hold snow, the snow begins to melt and your hand feel cold. This is because melting snow…

A:

Q: When calculating the heat of reaction why did we have to add C calorimeter   specific heat ?

A: A calorimeter is a device used to determine the quantity of heat involved in the chemical or…

Q: Cooking an egg is one type of process, while the formation of snow is another. Which answer best…

A: In Endothermic  Reaction  Heat is absorbed  while in Exothermic  Reaction  heat is Released.

Q: Directions: Please complete this worksheet on a separate piece of paper. 1. What is the specific…

A: Given :  1. Mass of aluminum = 28.4 gm   Heat given = 207 J Increase in temperature = 8.1 ° C  2.…

Q: 9.  If 14.5 kJ of heat were added to 485 g of liquid water, how much would its temperature…

A:

Q: en the thermochemical equation : O2(g) + O₂(g) Ⓡ2SO3(g), DH rxn= -198 kJ/mol, w much heat is evolved…

A: Given: 2SO2(g)+O2(g)→2SO3(g)   ∆Horxn=-198 kJ/mol Mass of SO2 is 600 g To find: Heat evolved

Q: Which of the following physical processes is exothermic? a. evaporation of alcohol b. melting of…

A: Concept  1) release of energy is known as exothermic process.  2) absorption of energy is called…

Q: Calculate the amount of heat released from combustion of 1 g of wood

A: Please find your solution below : Note : This question requires the values of heat capacity and…

Q: can you explain why energy must initially be consumed in an exothermic chemical reaction?

A: Exothermic reactions are those reactions which release energy in the surroundings due to the…

Q: heat

A:

Q: how much heat (in kJ) is released

A: Given :- CH4(g) + 2O2(g) ---> CO2(g) + 2H2O(g).     ∆H°= -802 kJ/mol  Number of moles of CH4 =…

Q: Classify the following reactions as endothermic or exothermic.

A: The reaction can be classified into two category namely endothermic and exothermic reactions as…

Q: Which of the following describes a reaction that "feels" cold? Exothermic Endothermic There isn't…

A: Given  the following discrib a reaction thats feel cold

Q: -Calorimetry Questions 1. A 24.6 g sample of nickel is heated to 110.0 °C and then placed in a…

A:

Q: If you have an endothermic reaction and you add heat or energy, which way the reaction is shifting?…

A:

Q: Explain why hell is exothermic?

A: Exothermic reaction During the reaction the heat is released from the system is called exothermic…

Q: A reaction is allowed to take place in an insulated container containing 100 mL of water. If the…

A: Changes in energy take place during chemical processes. In chemical reactions, energy is absorbed…

Q: CH, (g) 20, (g) CO, (g) + 2 H,0 (g) Exothermic or endothermic

A:

Q: A sample of water is heated from 25 o C to 75 o C. This adds 2.09 X 10 4 J of heat energy into the…

A: The mass of the water is to be calculated

Q: A 4.8 sample of water starting 56 C loses 448 J of energy in the form of heat. What is the final…

A:

Q: A 4.81 g sample of an unknown salt (MM = 116.82 g/mol) is dissolved in 150.00 g water in a coffee…

A: Mass of unknown salt = 4.81 g Molar mass of unknown salt = 116.82 g / mol Moles of unknown salt…

Q: 78.50 grams 2.30 C 105 cal (2) (3) Mass of Metal B ATemperature Heat lost/gained by Metal B Specific…

A: