.Assess the chemical reactions given below and answer the questions. Calcium carbonate +heat = calcium oxide + carbon dioxide Calcium oxide + water = calcium hydroxide + heat (a) Mention the reactants and products in each case. (b) Which among these is endothermic? Which one is exothermic? end

Q: In a chemical cold pack, two substances are kept separateby a divider. When the divider is broken,…

A: In case of exothermic reaction heat is produced to the surroundings whereas in case of endothermic…

Q: When carbon disulfide, CS2, forms from its elements, heat is absorbed. How much heat would be…

A: Number of moles of carbon disulfide = 6.5 moles

Q: The reaction of hydrogen and nitrogen gases produces 5.00 g of ammonia and releases 3250 cal of…

A:

Q: Given the specific heat of lead is 0.129 J/g.C and that it takes 93.4J of energy to heat a sample of…

A: Specific heat It is amount  of heat required to change the temperature of a substance by 1 Degree of…

Q: Which of the following is true about an exothermic reaction? O The number of moles of products is…

A: ''In exothermic reaction, heat is released" therefore heat of reaction is negative

Q: reaction for C,H, is 3) 12 CO, (g) + 6 H,O(1) + 6542 kJ and the heat produced from the burning is…

A: Final Temperature of water = 29.80°C

Q: Classify each of the following chemical changes as exothermic or endothermic reaction. Chemical…

A: Hey, since there are multiple questions posted, we will answer first question. If you want any…

Q: For this experiment, 16.55 grams of nitrogen gas and 10.15 grams of hydrogen gas are allowed to…

A:

Q: A calorimeter is used to measure the heat absorbed or released in a chemical .1 or physical process…

A:

Q: Propane (C3H8 readily undergoes combustion. When 1.00 kg of propane is burned, how much heat is…

A: Combustion of propane can be represented as C3H8 (g) + O2 (g) ---------> 3 CO2 (g)  +4 H2O (l)…

Q: Methane, CH4, is a major component of marsh gas. When 0.5000 mol methane burns to produce carbon…

A: Given : Heat = -445.1 KJ

Q: What is the heat of reaction and what is the difference between an endothermic and an exothermic…

A: The energy released or absorbed during a  chemical reaction is termed as the heat of reaction or…

Q: what is ΔHcond for this substance?

A:

Q: How many grams of C6H6 must decompose according to the chemical equation to transfer heat 430 J of…

A: The decomposition reaction is, 1 mole of reactant is decomposing and transfers 630Kj of heat or (63…

Q: An advertisement for a commercial hand warmer claims that the hand warmer works because a chemical…

A: Answer:- This question is answered by using the simple concept of exothermic reaction in which het…

Q: Enter your answer in the provided box. A system conducts 197 cal of heat to the surroundings while…

A: Recall the following expression from first law of thermodynamics          ∆U=q + w amount of heat…

Q: 3. A solid chemical called Instant Ice can be purchased, which when mixed with water at room…

A: Endothermic reactions are those in which the enthalpy change, that is the difference in enthalpy…

Q: what is ΔHcond for this substance

A:

Q: How many kilojoules of heat are absorbed when 40.7 g of MgO(s) is decomposed into Mg(s) and O2(g) a…

A: The reaction given is, => 2 Mg (s) + O2 (g) ------> 2 MgO (s)                          ΔH =…

Q: C (s) + 02 (g)- CO2 (g) AH° = -393.5 kJ Calculate the heat change if 2.54 g of C is reacted.

A: Given information, ∆H° ( for 1 mole of C(s)) = -393.5 kJ Mass of C(s) reacted = 2.54 g Molar mass of…

Q: Are the combustion reactions of oxygen exothermic or endothermic? Support that answer with the…

A: A question based on chemical thermodynamics that is to be accomplished.

Q: If 10.27 kJ of heat is given off when 51.93 g of unknown acid condenses from vapor to liquid, what…

A: Condensation is a process of conversion of vapor to liquid. Enthalpy of condensation is the enthalpy…

Q: You have a piece of iron, the specific heat of iron, the specific heat of iron is 0.449 J/g °C and…

A: Specific heat :-  The amount of heat required to rise the temperature of one gram of a substance…

Q: How much heat (in kilocalories) is released from the combustion of 5.00 g of ethanol?

A: The mass of ethanol given = 5.00 g The standard specific heat of combustion of ethanol is Hc = 7.1…

Q: The reaction between nitrogen and oxygen gases requires the absorption of 43 kJ of energy per mole…

A: The reactions in which heat energy is released from the system are known as exothermic reactions.…

Q: The reaction between nitrogen and oxygen gases requires the absorption of 43 kJ of energy per mole…

A: The balanced reaction taking place is given as, => N2 (g) + O2 (g) -----> 2 NO (g)…

Q: For this question, is this an endothermic or exothermic reaction? I am confused at the part where…

A: We will use first law of thermodynamics

Q: When it comes to energy, which type of reaction is the burning of wood? Is it an endothermic…

A: The given reaction is burning of wood. In this reaction the oxygen is reacted with cellulose to…

Q: If the mass of a truck is tripled-for example, when it is loaded-by what factor does the kinetic…

A: 1) mass is tripled  2) mass becomes one fifth

Q: Which of the following correctly states the purpose of the Calorimetry experiment? (Experiment 1) To…

A: Applying concept of calorimetry.

Q: Calorimetry measures the heat transfer for chemical reactions. Find two foods n your house that you…

A: Mass of food = 2 g  Volume = 5L

Q: The answer to this question is a numerical answer. Please report the numerical answer to 1 decimal…

A: Given:  The volume of HCl is 50.0 mL. The volume of NaOH is 31.8 mL. The molarity of HCl is 0.100 M.…

Q: What is the kinetic energy of a 63.4 gram bullet moving at a velocity of 318 meters per second?…

A: Given values are, Mass ,m =63.4 g =0.0634 kg Velocity,v= 318 m/s

Q: Hydrogen sulfide, H2 S, is produced during decomposition of organic matter. When 0.4300 mol H2S…

A:

Q: What is the specific heat of a substance if 373 J of heat is required to raise the temperature of a…

A: Q = m . s . ∆T Where, Q = heat required; m = mass of substance; s = specific heat and ∆T =…

Q: Hydrogen sulfide is produced during the decomposition of organic matter. When 0.5380 mol H2S burns…

A: Given: H2S burns to produce SO2(g) and H2O(g) with heat release of -278.7 kJ

Q: The reaction between nitrogen and oxygen gases requires the absorption of 43 kJ of energy per mole…

A: Given Reaction: N2(g) + O2(g) ------>2NO (g)          ΔH = 43 KJ/mol

Q: rogen sulfide, H2S, is produced during decomposition of organic matter. When 0.4190 mo H2S burns to…

A: Given, Heat released = -217.0 KJ

Q: A certain chemical reaction releases 33.8/kJg of heat for each gram of reactant consumed. How can…

A:

Q: A household water heater containing 50 gallons (227 L) of water is heated burning natural gas…

A: Given: Volume of water heated = 227 L Initial temperature of water = 25.0 oC Final temperature of…

Q: What is the kinetic energy of a 147 gram baseball moving at a velocity of 47.2 meters per second?…

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: A solid chemical called Instant Ice can be purchased, which when mixed with water at room…

A: Instant ice absorbs heat from the water at room temperature when instant ice and water are mixed…

Q: Which of the following statements is NOT true about an exothermic reaction. O A. Exothermic…

A:

Q: What is the heat, q, in joules transferred by a chemical reaction to the reservoir

A: Given :-  mass = 155 g  Initial temperature = 22.0°C  Final temperature = 26.5 °C  Specific heat…

Q: When 1 g of water evaporates, the organism gives off 0.58 kcal of heat. At a comfortable…

A: Given: 1 g of water gives 0.58 kCal of heat. Rate of water evaporation = 35 m/h density of water = 1…

Q: Enthalpy is the a. Heat of combustion at constant pressure b. Heat of formation at constant pressure…

A: Interpretation -  To determine the energy of a system at constant pressure, when enthalpy is the a.…

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: The combustion of one mole of benzene, C6H6, in oxygen liberates 3268 kJ of heat. The products of…

A: Given,  The combustion of one mole of benzene, C6H6, in oxygen liberates 3268 kJ of heat  The…

Q: 6. Calculate the heat change, in kJ, the following reaction:

A: Mass of PCl5 = 5.9217×1014ng = 5.9217×105g Molar mass of PCl5 = 208.24g/mol Moles of PCl5 =…