OCHEMICAL REACTIONS Calculating the heat of reaction from molar reaction enthalpy a... A chemist measures the energy change AH during the following reaction: 2 NO2(g) N204(g) AH = -55.3 kJ Use the information to answer the following questions. endothermic. This reaction is... x10 exothermic. Yes, absorbed. Suppose 70.1 g of NO, react. ? Yes, released. Will any heat be released or absorbed? No. If you said heat will be released or absorbed in the second part of this question, calculate how much heat will be released or absorbed. kJ Round your answer to 3 significant digits. X II

Q: Mass of can (g) Mass of can and water (g) Initial mass of food sample (g) Final mass c food sample…

A: We can use the given data and required conversion factors for calculations.

Q: e shows the number chemical Change C cal Reaction Read of the following state hemical reaction A, b…

A: Types of chemical reaction 1. Chemical combination reaction or synthesis reaction 2. Chemical…

Q: if you spill some of the hydrochloric acids on the table during the reaction of hydrochloric acid…

A: The heat of neutralization: The amount of heat released by the reaction of one mole of an acid and…

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

A: Endothermic reactions are one , which proceeds with absorption of heat. That  is reactants absorbs…

Q: 16. What is the law of conservation of mass?

A: The law of conservation of mass states that :"The mass in an isolated system can neither be created…

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: energy threshold

A: Threshold Energy is the minimum energy that the molecules must have in order to bring about…

Q: please help with this question

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Q: A calorimeter is used to measure the heat absorbed or released in a chemical .1 or physical process…

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Q: 1. Chemical potential energy is found in the. between atoms and is transformed into energy during…

A: Specific heat of Fe = 0.451 J/g degC Specific heat of Pb = 0.129 J/g degC

Q: A student places a block of hot metal into a coffee cup calorimeter containing 162.2 g of water. The…

A: 162.2 g of water.T1 = 21.3 oCT2 = 37.6 oC

Q: 4. Most chemical reactions what we discuss in chemistry occur on the lab bench and are therefore…

A: When a substance changes its phase from one phase of matter to another phase of matter either heat…

Q: Decide whether each of these reactions is exothermic or endothermic. 1. When two chemicals mix their…

A: An exothermic reaction is one that is associated with the evolution of energy (usually in form of…

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: When a chemical reaction or a phase change occurs and energy is released to the surroundings then…

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

Q: Which of the following is true about enthalpy changes when a salt dissolves in water? a) if the…

A: To solve this problem we have to know about the enthalpy change of resulting solution made by…

Q: Calculate the number of joules in calories 258 calories =? JOULES 9740 J = ? CALORIES  PLEASE…

A: The energy is measured using units such as Calorie and Joules. The relation between Calorie and…

Q: The energy stored by a body by virtue of its position or chemical composition is termed A) kinetic…

A: Kinetic energy: The energy stored by a body by virtue of its position Potential energy: The energy…

Q: When the temperature is decreased, how would you describe a chemical reaction that produces heat?…

A: Chemical reactions are two types based on whether they release or absorb heat.  When a chemical…

Q: Please select the incorrect assertion from the following: A. Heat is energy that is transferred as a…

A: Temperature is a physical quantity. It measures the hotness and coldness of a system.

Q: Heat Evolved (J) 50 45 40 35 30 20 15 10 S Relationship Between Amount of Reactant and Energy ° 10…

A:

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: Which of the following correctly states the purpose of the Calorimetry experiment? (Experiment 1) To…

A: Applying concept of calorimetry.

Q: When 435 J of heat is added to 3.4 g of olive oil at 21°C, the temperature increases to 85°C. What…

A:

Q: 2.What happens to the average kinetic energy of the water molecules in your body when you have a…

A: 2. Given information,       Average kinetic energy of the water molecules in your body when you have…

Q: 1. VOCABULARY – Correct each incorrect sentence by changing only the underlined words. 1.…

A: The corrected statement are as follows:1. Temperature is the average molecualr KE and internal…

Q: This topic is about endothermic and exothermic process. Why do you think volatile substances, like…

A: In this question, we want to discuss about cooling effect of volatile substances like acetone and…

Q: potential energy Ethanol Oxygen Carbon dioxide .steam Use the graph above to explain if the…

A: The change of energy of reaction occurs at constant pressure is called enthalpy of reaction.

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

A:

Q: Water droplets condensing on the inside of a window on a cold day. Is this process exothermic or…

A: Exothermic Reaction :- The loss of heat during the reaction contain reactants concerted into product…

Q: The fow of energy due to a temperature difference is known as  A) heat  B) temperature C)…

A: GivenMass of water = 67.42 gInitial temperature =Ti = 1.2°CFinal temperature = Tf = 97.4 °C

Q: can you explain why energy must initially be consumed in an exothermic chemical reaction?

A: Exothermic reactions are those reactions which release energy in the surroundings due to the…

Q: Energy being absorbed in a substance that causes it to get cooler is known as what type of reaction?…

A: Solution All chemical processes area unit in the midst of energy changes. once a reaction takings,…

Q: What is the AH value for an exothermic energy change? * Always negative Always positive Could be…

A: Thermodynamics is branch of chemistry in which we deal with amount of heat evolved or absorbed…

Q: You put a pot of water on the stove and the water begins to boil. System: Surrounding: Direction of…

A: Exothermic reaction are those reaction in which heat is evolved while reaction in which heat is…

Q: Carbon atoms entering the flame are part of Organic molecules The flame needs oxygen because it is…

A: Interpretation - To complete the story with the help of given words.