In a coffee cup calorimeter experiment, 75.0 g of H2O and 50.0 mL of HCl are mixed. The jnitial temperature of the HCl was 30.6 degree C and the water was originally at 15.2 degrees C. After the reaction, the temperature of bith substances is 22.9 degrees C a) was the reaction exothermic or endothermic? Explain. b) Calculate how much heat the water lost or gained.

Q: If 87 J of heat are added to a balloon, causing it to expand from 1.0 L to 1.4 L under 0.97 atm of…

A: Given: Required heat = 87 J Initial volume = 1.0 L Final volume = 1.4 L External pressure = 0.97…

Q: 1. If a 100-kg sample of aluminum at 25.0 °C is heated with 500 kJ of heat energy, what will be the…

A: The heat absorbed by the aluminium is given by: where m= mass of metal = 100 kgIni q= total heat…

Q: 8. 66.80 g of lead is heated to 155°C and then placed into a foam cup calorimeter containing 70.0 mL…

A: Given that  : Mass of lead (ml)= 66.80 g Temperature (Tl)= 1550C = 428 K Volume of water = 70.0 mL…

Q: 2. A solution is formed by combining 10 mL of solution A and 40 mL of solution B. Find out the heat…

A: We know that  Heat change of the reaction is  Qreaction = - Q calorimeter  = - m × C × ∆T And, the…

Q: If 75.0 grams of water is heated from 32.6°C to 78.9°C, how many kilojoules of heat does the water…

A: Given - - > Mass, m = 75 g Initial temperature, T1 = 32.6°C Final temperature, T2 = 78.9°C…

Q: what is the anwser to  A student heats a 200 g sample of water from 20oC to 80oC. The specific heat…

A: The answer to the following question is-

Q: How much heat (J) must be added to a 50.0 g sample of zinc if the temperature increases from 20'C to…

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

Q: If the specific heat of water is 4.186 J/g °C, how much heat is required to increase the temperature…

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Q: How much heat is given off to the surroundings when 7 g of aluminum reacts according to the…

A: The enthalpy of the reaction is considered as the state function that is it depends only on the…

Q: A 44.3 g sample of water at 100.00 °C (specific heat of water = 4.184J/g.°C) was placed in an…

A:

Q: Tin has a specific heat of 0.21 J/g°C. If a 3.2 kg sheet of tin absorbs 8.4 kJ of energy, by how…

A: According to the equation, Q=mcdTQ=heat absorbedm=mass of substancedT= change in…

Q: When a 4.25 g sample of solid ammonium nitrate dissolves in 60.0 g of water in a coffee- cup…

A: 1) Since the temperature of the water in coffee-cup calorimeter is decreasing from 22 to 16.9 oC…

Q: A sample of 24.9 g of ammonium nitrate, NH4N03, was dissolved in 121.3g of water in a coffee cup…

A: Mass of sample (ammonium nitrate) = 24.9 gram Mass of water = 121.3 gram Specific heat of solution =…

Q: The specific heat of an unknown metal is calculated to be 3.74J/g*C. What is the mass of the sample…

A: Answer is explained below.

Q: If 100 mL of water instead of 50 mL of water was used, how would the final temperature change? How…

A: Specific heat change is the amount of heat required to increase the temperature of 1 gram of…

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

A: Given, Mass of sample = 7.37 gMass of water = 150 g Mass of solution = 157.37 g Initial temperature…

Q: When 514 J of heat is added to a sample of liquid water, the temperature rises from 27.8°C to…

A: Specific heat capacity is the amount of heat needed to raise the temperature(usually 1°C) of given…

Q: In the laboratory a "coffee cup" calorimeter, or constant pressure calorimeter, is frequently used…

A: Given : mass of cold water = 84.35 g Mass of hot copper = 62.86 g Initial temperature of hot copper…

Q: Aluminum has a specific heat of 0.902 J/goC. How much heat is gained when a piece of aluminum with a…

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Q: 4) You are told that a chemical reaction is exothermic. How could you test whether the statement is…

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Q: Copper is sometimes coated on the bottom surface of cooking pans. Copper has a specific heat of…

A: Concept introduction: Heat capacity is the amount of heat required to raise the temperature by 1oC…

Q: A 248.5 g water bath is heated to 98.2 ˚C from 22.2 ˚C.  How much heat was absorbed by the water, in…

A: Specific heat and heat of the Substance are interrelated with each other by -   Q = C m ∆T Here, Q =…

Q: How much energy(in Joules) is required to heat 3.00g of water from 23.0 oC to 100.0 oC?

A: Given data: The mass of water m = 3.00 g. Initial temperature T1 = 23.0°C. Final temperature T2 =…

Q: When water cools from 10 °C and then freezes to become ice, which of the following best describes…

A: We know that, When the temperature decreases it loses energy to the surroundings. When water cools…

Q: Hydrogen sulfide, H2S, is produced during decomposition of organic matter. When 0.6850 mol H2S burns…

A:

Q: A 45g silver spoon (specific heat 0.24 J/g.°C) at 25 °C is placed in 180 g of coffee at 95 °C and…

A: The final temperature of the spoon and coffee will be same.  we know , Heat = ms∆T(m is…

Q: A piece of unknown metal weighs 217 g. When the metal piece absorbs 1.43 kJ of heat, its temperature…

A: Given: Mass of metal, m = 217 g Heat energy, q = 1.43 kJ Initial temperature, T1 = 24.5oC Final…

Q: Given that 154.81 g of solution increased in temperature by 4.82 °C, how much heat, in J, was gained…

A:

Q: What are the internal energy changes, ∆E, if a system; (a.) absorbs 67 J of heat and does 67 J…

A: Answer to all the parts are given below.

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: A 39 g aluminum spoon (specific heat 0.904 J/g-°C) at 25°C is placed in 178 mL (177 g) of coffee at…

A: A definite quantity of heat is used up in raising temperature of substances. For substance that…

Q: 1. The temperature of 13.5g of water increased from 15.0°C to 37.0°C. How much heat was absorbed by…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: 7. Calculate the specific heat of gold if it required 48.0 joules of heat to warm 25.0 grams of gold…

A:

Q: How much heat is required to raise the temperature of 25g of water from 25.0°C to 30.0°C? The…

A: Mass of water, m = 25 g Specific heat of water, Cs = 4.184 J/g °C Initial Temperature, Ti = 25 °C…

Q: A 77.5g piece of brass is heated so that its temperature is 98.7◦C. Next, it is quickly placed in a…

A:

Q: The specific heat of copper is 0.0920 cal/g °C, and the specific heat of silver is 0.0562 cal/g °C.…

A:

Q: he freezing point of mercury is -38.8°C. What quantity of energy, in joules, is released to the…

A: The density of liquid mercury =13.6 g/cm3. The mass of mercury = 1.00 mL × 13.6 = 13.6 g Hg.

Q: 2. A solution is formed by combining 10 mL of solution A and 40 mL of solution B. Find out the heat…

A: 2). given : 10 ml solution of A  40 ml solution of B

Q: In an experiment, 26.5 g of metal was heated to 98.0°C and then quickly transferred to 150.0 g of…

A:

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

A:

Q: The temperature of 34.7 g H2O changes from 27 °C to 53 °C. What is the heat associated with this…

A:

Q: The density of aluminum is 2.7 g/cm3 and its specific heat is 0.9 J/g.0. A piece of 9.7 cm3 aluminum…

A: Recall the following relation according to law of calorimetry          Q=mC×∆tHere Q is amount of…

Q: 3. How much heat is required to rise the temperature of 0.5 kg water from 30°C to its boiling point?…

A: Question 3. Given that, the mass of water is m = 0.5 kg. The initial temperature is T1 = 30oC =…

Q: A 8.17 g sample of an unknown salt (MM = 116.82 g/mol) is dissolved in 150.00 g water in a coffee…

A: Mass of salt sample = 8.17 g Mass of water = 150 g Total mass of solution ( m ) = 8.17 g + 150 g =…

Q: How much heat, in joules, must be added to a 5.00 × 102-g iron skillet to increase its temperature…

A: The heat is given by: q = m × c × ∆Tq = heatm = massc = specific heat∆T = change in temperature

Q: The temperature of a sample of water increases from 20C to 46.6C as it absorbs 5650J of heat. What…

A: It is given that the temperature of water increases from an initial temperature of 20°C to a final…

Q: 1. A thermometer placed in a solution undergoing a chemical reaction indicates an increase in…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: When a 6.50 g sample of solid sodium hydroxide dissolves in 100.0 g of water in a coffee-cup…

A: The formula used to calculate heat: m is the mass. Cp is the heat capacity. T2 and T1 are the…

Q: How much heat is given off to the surroundings when 6 g of aluminum reacts according to the…

A: Thermodynamics is the branch of chemistry that mainly deals with the heat transfer between system…