When you add water to a small amount of sodium chloride (NaCl), the solid dissolves and the solutiom becomes cold.  in which direction in thermal energy flowing between system and surroundings?  A. Thermal energy is released by the system  b. Thermal energy is absorbed by the system

Q: Consider two substances, A & B. Both substances have the same mass, same starting temperature and…

A: The specific heat capacity is defined as the amount of energy that must be added, in the form of…

Q: When 481 J of energy is added to 18.3 g of aluminum at 17.4°C, the temperature increases to 46.6°C.…

A: the heat capacity for aluminium is :

Q: The change in enthalpy when one mole of a compound forms from its constituent elements in their…

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Q: Which sample will reach the lowest final temperature when all samples evolve 12.5 J of heat and all…

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Q: When 45 g of an alloy metal, at 25°C, is dropped into 100.0 g of water, the alloy absorbs 956 J of…

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

Q: I don't know how to answer this question. The correct answer is in red.

A: The required relation is given below.

Q: The generic reaction X2(g) + Y2(g) → 2XY(g) has an enthalpy of -212 kJ. How many moles of XY were…

A: Given, Chemical Reaction : X2(g) + Y2 (g) ---> 2 XY (g)  ∆H = -212 KJ

Q: 35. What quantity of heat is required to raise the temperature of 55.5 g of gold from 20 °C to 45…

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

Q: 11. A piece of metal weighing 3.20 grams is heated to 100. °C. It is dropped into 50.0 grams of…

A: 11) Mass of the piece of metal = 3.20 grams Temperature=  100o CMass of water in calorimeter = 50…

Q: A 55.2 g piece of metal has a temperature of 90.4 °C before being placed into 102.5 g of water at…

A: Given details, For metal, Mass (m) = 55.2 g T1 = 90.4°CT2 = 24.7°C ∆T=(T2-T1)=65.7°C For water, Mass…

Q: To treat a burn on his hand, a person decides to place an ice cube on the burned skin. The mass of…

A: The relation of specific heat, change in temperature, mass and heat energy can be given as…

Q: Imagine lying on a hot beach on a sunny summer day. In what different ways is heat transferred to…

A: Imagine lying on a hot beach on a sunny summer day. In what different ways is heat transferred to…

Q: Metal Specific Heat (J/g.°C) Aluminum 0.903 Copper 0.385 Gold 0.128 Iron 0.449 Silver 0.235 If the…

A: Heat capacity : Heat capacity is a physical property of matter, defined as the amount of heat to be…

Q: A 15.0 gram piece of metal is heated to 65.0 °C and then dropped into 175 grams of 24.0°C water. The…

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Q: a. The methanol in an automobile engine must be in the gas phase before it can react. Calculate the…

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Q: 3. Select the INCORRECT description about heat. * 1 poir O A. Heat transfer occurs from a low…

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Q: consider the following metals, A, B, C and D at room temperature.  10 g of each metal absorbs 15 kJ.…

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Q: A liquid has a specific heat capacity of 4.25 J/g ̊C.  A 20.0 g sample of the liquid absorbs 324 J…

A: Specific heat capacity of liquid , c = 4.25 5 J/g ̊C Mass of sample , M = 20.0 g  Heat absorbed Q =…

Q: A cold pack contains 134.4 g of water and 40.7 g of ammonium nitrate. What will be the final…

A: The formula which is used in the solution is shown below. Q = mcΔT ⇒ ΔT = Q/mc

Q: To treat a burn on his hand, a person decides to place an ice cube on the burned skin. The mass of…

A: Given, mass of ice cube=13.2 gm mass of water=13.2 gm initial temperature=-12.7°C final…

Q: Assuming constant pressure, rank these reactions from most energy released by the system to most…

A: Answer: In chemical thermodynamics when system gains the heat, it is taken as positive and system,…

Q: A 113.25 gram sample of gold is initially at 100.0 °C. It loses 20.00 J of heat to its surroundings.…

A: We have given that  A 113.25 gram sample of gold is initially at 100.0 °C. It loses 20.00 J of heat…

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: 2

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

Q: What will be the final temperature of a 814.4 g sample of water at 40.2°C if the sample gains 92.00…

A: "Since you have asked multiple question, we will solve the first question for you. If youwant any…

Q: Which statement describes the effect of adding more energy to a system, assuming a phase change does…

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Q: Heat is applied to 50g of water (specific heat of 4.18J/°C) at 25°C.  The temperature of the water…

A: Since you have asked multiple type questions, we will solve only first  questions for you. If you…

Q: A hot 122.8 g lump of an unknown substance initially at 154.8 °C is placed in 35.0 mL of water…

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Q: Substance X was dissolved in a beaker of water, and it was observed that the beaker felt warmer.…

A: Exothermic reaction and endothermic reaction: Exothermic reaction : Exothermic reactions is a…

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…