Which one of the following is an exothermic process?

Q: Calculate q for the sample

A: when temperature of water decreases from 23.0 degree to 4.5 degree , heat is released .

Q: arriors arrives at a blacksmith to get new weapons 1.74 kg of iron at 1371 °C, which was cooled down…

A: Suppose, the final temperature of the iron longsword is t°C.  At equilibrium, both the iron and…

Q: A student places 125g of liquid water, H201), at 24 °C into a coffee-cup calorimeter, and then adds…

A: Here the system is showing two change , one is the dissolution of KBr and another one is for…

Q: 11. An electric motor produces energy to turn a fan blade. The energy used to turn the fan blade is…

A: Answer

Q: 14. Heat energy equal to 25,000 J is applied to a 1200 g brick whose specific heat is 2.45 J/g°C. a)…

A: Given that,  Amount of Heat applied to brick q = 25000 J Mass of brick m = 1200 g Specific heat…

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

A:

Q: An automobile engine provides 623 Joules of work to push the pistons. In this process the internal…

A: Given: Work done = 623 Joules Change in internal energy = -2731 Joules

Q: A chunk of mercury at 80.8°C was added to 300.0 g of water at 15.5°C. The specific heat of mercury…

A: Given: For water: Mass of water, mw=300.0 g Temperature change, ∆T=(20.9-15.5)°C=5.4 °C Specific…

Q: C. What is the overall temperature change? i °C

A:

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

A: Step : 1           How much heat is absorbed by the ice cube and resulting water?

Q: 19. Boiling water on the stove for cooking can be classified as a(n) process. - O endothermic…

A: If ∆H>0, then that will be an endothermic process. If ∆H<0, then that will be an exothermic…

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

A: Mass of ice = 10.6 g   This process involves the following steps Heat associated with the…

Q: A 32.07 gram sample of vanadium was heated to 75.0 degrees celsius initial temperature). It was then…

A:

Q: Sodium acetate dissolves readily in water according to the following equation. NaC2H3O2 (s) →…

A: Given that, sodium acetate dissolves in water according to the following chemical equation as…

Q: A 89.5 g piece of copper (specific heat 0.38 J/g･°C) is heated and then placed into 400.0 g of water…

A: As copper piece is at higher temperature than water, in order to attain equilibrium heat gets…

Q: Which of these descriptions of heat energy is not correct?a. Heat energy flows between objects that…

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

Q: temperature

A:

Q: 16) Which of the following is an exothermic process? A) condensation of water vapor B) Ammonium…

A: Exothermic process is a process in which energy get released during the course of reaction and the…

Q: 3. 36,144J is needed to change 4 kg of substance from 12 °C to 30°C, what is the substance? Show…

A:

Q: A 2.50 g sample of zinc is heated, then placed in a calorimeter containing 7.50 mL of water. The…

A: Given information, For Zn, m = 2.50 g delta T = (22.50 deg C - Ti) C = 0.390 J/g deg C For H2O, m =…

Q: Which of the following is an exothermic change? O A. Melting CO B. Vaporization O C. Sublimation D.…

A: The answer to the following question-

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

A:

Q: 13. A student takes 22 grams of an nknown metal places them into a boiling water bath. She leaves…

A: The amount of heat required to raise the temperature of the sample is given by: q = mc∆Tq is the…

Q: Energy Cannot be Created or Destroyed melting Calorie Energy is absorbed Study of Heat and Energy…

A: In the thermodynamic there are various concept related to the heat , energy and temperature . In the…

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: An automobile engine provides 613 Joules of work to push the pistons. In this process the internal…

A:

Q: A small piece of metal is heated and placed in a foam cup calorimeter containing 50.0 mL of water at…

A: q= mc∆t Q= 522.2joule

Q: A beaker contained 69.68 g of water at 15.25°C. A 81.2-g sample of metal at 52.22°C was placed in…

A: Given that : The mass of water (mw)= 69.68 g Temperature of water = 15.25°C The mass of sample (mm)…

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

A:

Q: Given values: Substance: oxygen (O2) specific heat capacity (c): 0.918 J/(g.°C) amount (m): 899.7 g…

A:

Q: A 45.9 g sample of a metal is heated to 95.2°C and then placed in a calorimeter containing 120.0 g…

A: The amount of heat lost by the metal(qm) is equal to amount of heat gained by water(qw) and vessel…

Q: 29. Which of the following statements best describes the function of heat as absorbed during…

A: Heat is a thermodynamics  quantity which has significant importance  in the area of thermodynamics.

Q: 5. Consider equal amount of wood and glass. Assuming that equal amount of heat is absorbed by these…

A: Heat capacity is the amount of heat required by one gram of a substance to increase its temperature…

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: Sodium acetate dissolves readily in water according to the following equation. NaC2H3O2 (s) →…

A: During a chemical reaction, the product formation is takes place either by absorbing energy or by…

Q: Suppose that 25 g of  substance is initially at 27.0°C. What is the final temperature of each…

A: Step : 1             What is the final temperature of gold upon absorbing 2.35 kJ of heat?

Q: O THERMOCHEMISTRY Understanding the definition of entl Measurements show that the enthalpy of a…

A: Thermodynamics is the study of flow of matter. Enthalpy is the sum of system’s internal energy. Its…

Q: A 142.7 g piece of copper (specific heat 0.38 J/g °C) is heated and then placed into 400.0 g of…

A: Write the expression to calculate heat change of a system due to change in temperature. ∆H=ms∆t…

Q: How much heat is required to change temperature of 2g of water from 34°C to 68°C? (Water has a…

A: Q = m C ( T2-T1)

Q: student's initials 1046 PP3A Thermo Page2 INCLASS A 2.00g mass of silver at 100. °C is placed in a…

A: Given:  Mass of silver(m)=2.00g Initial temperature(T1)=100oC Final temperature(T2)=45oC Change in…

Q: A student heated a 56.0000 g metal object to 97.3 °C and transferred it to a calorimeter containing…

A: Given data mass of water = m = 100.4300 g Initial temperature of water : T1 = 25.2 oC Final…

Q: A 113.9 g piece of copper (specific heat 0.38 J/g･°C) is heated and then placed into 400.0 g of…

A: Q = m . s . ∆T Heat given = heat taken

Q: One tablespoon of cookie dough has a mass of 15.85 g. It is combusted in a calorimeter whose heat…

A: 1 Joule = 1/4184 cal  Or 1 KJ = 1000/4184 cal

Q: An automobile engine provides 633 Joules of work to push the pistons. In this process the internal…

A: From first law of thermodynamics, we know :  ∆U = q + w Where ∆U = Change in internal energy. q =…

Q: 11. A 32.07 gram sample of vanadium was heated to 75.0 °C (its initial temperature). It was then…

A: Answer :- 48.03 g  The mass of water in calorimeter is 48.03 g

Q: time will not stop. swer all questions to the best of your ability. Ek, Question 2 A 100.0-g sample…

A: Given that: Mass of water(m) = 100.0g Initial temp(T1) = 25.0°C Final temp.(T2) = 27.0°C Change in…

Q: Calculate the amount of heat needed to raise the temperature of 10g of aluminum from 100°C to 115°C.…

A: Given, Mass of aluminium (Al) = 10g. Initial temperature (Ti) = 100 degree Celsius. Final…

Q: A 100.0-g sample of water has an initial temperature of 25.0°C. The final temperature of the after…

A: