which of the following phase transitions is/are exothermic? 1. liquid water evaporating into the gas phase 2. the sublimation of solid carbon dioxide into the gas phase 3.) gaseous butane condesning into a liquid at its boiling point   1,2, and3 1 only 2 only 3 only 1 and 2

Q: The calorie content of a candy bar is 230. Calories per serving (1 bar). Calculate the specific…

A: The Calorie content of the candy bar is = 230 Calories per bar1 candy bar = 52.7 g1 Calorie = 1000…

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A: Given, Mass of golf ball = 45g

Q: Select every statement that is true about heat, temperature, and phase changes.

A: a- At 100° C, water is boiled which is its boiling point and it turns into vapour phase So it is a…

Q: A 4.0 g sample of a substance was heated from 0oC to 20oC. It absorbed 35.2 J of energy as heat.…

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Q: 3. Is solid → liquid → gas an endothermic or exothermic process? Describe how this energy change…

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Q: What is the specific heat for a piece of metal that requires 1.7 kJ of energy to raise the…

A: The specific heat is the amount of heat per unit mass required to raise the temperature by one…

Q: Which of the following equations shows a correct chemical reaction for the following graph? 50 40 30…

A: The energy diagram of a reaction is drawn by taking potential energy at the y- axis, and reaction…

Q: The specific heat of silver is 0.24 J g*C. How many jules of energy are needed to arm 4.37 g of…

A: Given, Specific heat = 0.24 J/g°C m = 4.37 g Final temperature, Tf = 27.5°C Initial temperature, Ti…

Q: A substance is characterized by the thermodynamic data below. Using this, determine the amount of…

A: Given, Mass of substance = 125.0 g Initial temperature of substance = 69.8 oC The amount of heat…

Q: Calculate the heat capacity of the calorimeter. If when mixing 25.00 mL of 0.70 M NaOH and 50.00 mL…

A: Given: Vol of NaOH =  25.00ml Vol of HCl = 50.00ml Volume of solution = 75.00ml So, mass of solution…

Q: How much heat is gained by copper when 77.5 g of copper is warmed from 21.4°C to 75.1°C? The…

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Q: A 500—g iron rod is cooled from 90°C to 30°C. How much is the amount of heat released bythe metal?…

A: C. 13.5 kJ Given that Amount of iron rod m = 500 g Initial temperature of iron rod T1 = 90°C Final…

Q: QUESTION 5 Which of the following statements is true? Heat is a form of energy, but temperature is…

A: In this question, we will select the correct statement about heat and temperature.  You can see the…

Q: How much heat must be applied to a 18-g sample of iron (S = 0.384 J/(g °C)) in order to raise its…

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Q: 2.5 x 10° Kg of hydrogen gas is heated from 17.0°C to 23.0°C. The specific heat capacity of hydrogen…

A:

Q: A substance is characterized by the thermodynamic data below. Using this, determine the amount of…

A: Mass of substance = 125.0 gm Initial temperature of substance = 2.3 oC

Q: If 34.8 J is required to change the temperature of 10.0 g of mercury by 25 K, what is the specific…

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Q: The specific heat of silver 0.24 J/g°C. How many joules of energy are needed to warm 4.37g of silver…

A:

Q: 8 85 30 8 75 70 65 8 9 10 11 12 13 14 15 16 17 18 Time/min Use the above Cooling Curve to answer the…

A: A cooling curve is a plot of temperature change Vs time. It represents the change in the state of a…

Q: Calculate the AHrxn for this overall reaction: 2 H3BO3(aq) → B203(s) + 3 H20) given the following…

A: Given: 2H3BO3(aq)→B2O3( s)+3H2O(l) To find: ∆Hrxn

Q: 1. How much heat, in joules, is absorbed by 500.0 g of water as its temperature is increased from…

A: So we’ve to calculate the energy and specific heat capacity in the respective question. We can solve…

Q: The specific heat capacity of liquid mercury is 0.14 J g¹ K-¹. How many joules of heat are needed to…

A: Specific heat capacity is defined as the amount of heat required to raise the temperature of one…

Q: Calculate the specific heat of concrete if 3620 J of heat causes the temperature of a 250 g sample…

A: A temperature rise of the sample indicates that heat is absorbed by the sample. The formula of heat…

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

Q: Calculate the amount of heat (in kJ) required to raise the temperature of a 0.169 kg sample of…

A: Well change in temperature = 367.4 - 298 = 69.4 K equivalent to 69.4 °C   To raise 1 g through 1°C…

Q: How much heat is put into 100g of water to raise temperature from 25.0 to 75.0°C? The specific heat…

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Q: What amount of heat is needed to raise the temperature of 25.5 g of water from 18oC to 29oC? Water's…

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

Q: How much energy is required to heat 10 grams of water from 50 Celcius degrees to its boiling point?…

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Q: 80 60 Temperature (°C) 40 20 -20 -40 10 20 30 Time (min) What is happening withthe substance when…

A: The physical state of a matter depends on the temperature and the pressure. As we heat a solid, the…

Q: 12. When freezing weather threatens the citrus crop in Florida, growers spray their orange trees…

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Q: Fifty grams of an unknown substance at 115 degrees Celsius is added to 100 gof liquid water at 20…

A: According to the Law of Calorimetry, heat absorbed by any substance is equal to the heat released by…

Q: 5. Why does the temperature stay constant as the ice melts into water and as the water boils to a…

A: The concept behind why the temperature remains constant while phase transition can be explained with…