True or false, a chemical reaction that liberates heat energy is said to be exothermic.

Q: a system releases 349 cal of heat and has 258 J of work done to it, what is the change in energy of…

A: The question is based on the concept of chemical thermodynamics.  we have to calculate change in…

Q: What is the kinetic energy of a baseball with a mass of 117.7 g traveling at a speed of 1.377 m/s?

A: Given, Mass of a baseball (m) = 117.7 g = 0.1177 kg Speed of a baseball (v) = 1.377 m/s Kinetic…

Q: What is the specific heat of a 1,500.00 gram sample of wood that absorbs 67,500 Joules of heat…

A: The given data contains, mass = 1500 g. Heat = 67500 Joules.

Q: What is the specific heat of a 66.51 g piece of an unknown metal that exhibits a 45.2°C temperature…

A: The relation between specific heat and heat energy is given by q = m * C * ΔT Where q = heat energy…

Q: In the laboratory a student finds that it takes 75.4 Joules to increase the temperature of 13.3…

A: Specific heat capacity is the amount of heat that is required to rise a temperature of 1 kg…

Q: What is the difference between an exothermic and an endothermic reaction?

A: An exothermic reaction is a chemical reaction  in which energy is released during the reaction.…

Q: A chemical equation where heat is tranferrad to the surroundings is ala) exothermic or veaction.…

A: The part of the universe where the reaction takes place is known as the system and the remaining…

Q: If AH = -54.74 kJ for a chemical reaction, that reaction O is endothermic cannot occur is exothermic

A: In endothermic reaction heat is require while in exothermic reaction heat is given off.

Q: What's a hypothesis about the experiment Enthalpy Changes in Chemical Reactions?

A: In a chemical reaction, heat may be absorbed by the system or heat may be evolved by the system.…

Q: Rewrite the equation as thermochemical equations in two different ways to include the heat…

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Q: Give an example of a reaction that represents the heat of formation?

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Q: Can you conclude that heat is always noticeably released in a chemical reaction?

A: Can you conclude that heat is always noticeably released in a chemical reaction?  answer of the…

Q: What kind of kinetic energy is most often produced from chemical energy in chemical reactions?

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Q: How do I calculate the specific heat of metal if 1027 joules of energy are needed to raise the…

A: q = m .C . ΔT  WHERE  heat = q = 1027 J  mass of metal = m = 42.9 g specific heat of metal  = C =…

Q: The temperature of a brass bar by 10.0°C when it absorbs 2.00kJ of energy by heat. The mass of the…

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Q: If 115 cal are added to 49.2 g of solid iron, what is the change in temperature of the iron? The…

A: The objective of this question is to calculate the change in temperature (ΔT) of the iron when a…

Q: 4. What is the specific heat of iron, if it requires 1050 J of heat energy to raise the temperature…

A: Heat required = 1050 J Initial temperature = 10.0°C Final temperature= 20.4°C Change in temperature…

Q: How much heat will be released a 4.5 g of CH4 is burned. H= -802kJ/mol

A: Given data,  Mass of CH4 is burned = 4.5 g  Enthalpy , H = - 802 KJ/mol  Molar mass of CH4 = {12 +(4…

Q: a system has 63.5 J of heat added to it, and the system does 75.5 J of work on its surroundings,…

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Q: A 440.0 g quantity of a certain metal is heated to 100.0 C. It is immediately placed into 258 g of…

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Q: In the laboratory a student finds that it takes 79.6 Joules to increase the temperature of 14.8…

A: The specific heat capacity of copper (C) can be calculated using equation (1). In this equation, m…

Q: determine and compare the quantity of heat energy released in three exothermic chemical reactions.

A: Exothermic reactions are the reactions in which heat is evolved in products that is energy is…

Q: What is the specific heat of a 72.01 g piece of an unknown metal that exhibits a 45.2°C temperature…

A: Given data is  mass of sample = 72.01 g Temperature = 45.2 oC Heat absorbed = 1870 J Formula used…

Q: An isolated system is one that O exchanges heat and matter with the surrounds. exchanges neither…

A: answer : selected answer is correct

Q: A sample of unknown metal had a mass of 120.4g. As the sample cools from 90.5 degrees C to 25.7…

A: Given, mass of metal = 120.4 g Initial Temperature = 90.5°C  Final temperature = 25.7°C  Specific…

Q: A 120 gram sample of gold absorbs absorbs 1.2 kJ of heat. How many much does the temperature of the…

A: Given: Mass of the sample= 120 g Heat absorbed= 1.2 kJ Specific heat capacity of gold= 0.129 To…

Q: only water transferring energy to creating energy in increases endothermic slow down exothermic…

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Q: When thermal energy is transferred from the system to its surroundings, heat (q) is:

A: When thermal energy is transferred from the system to its surroundings, heat (q) is negative  It is…

Q: The temperature of a 33.7 g sample of metal increases by 27.2°C after absorbing 201.7 J of heat.…

A: Interpretation: The temperature of a 33.7 g sample of metal increases by 27.2°C after absorbing…

Q: If the dissolution of a salt in water is an endothermic reaction, how will the temperature of the…

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Q: e the specific heat of lead

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