The amount of heat required to melt 2 lbs of ice is twice the amount of heat required to melt 1 lb of ice. Is this observation a macroscopic or microscopic description of chemical behavior? Explain your answer.

Q: The temperature remains constant as energy is added to a substance. How may the substance be…

A: We have to tell which option is correct

Q: Water has a heat of fusion  at 80.0 cal per gram. If I have 4.14 g of ice at its melting point how…

A: Heat of fusion is 80 cal/g. We have 4.14 g of ice at 0°C. We have to calculate the heat required to…

Q: A sample of water at 23.9 °C required an input of 2.68 × 104 J of heat to reach its boiling point,…

A: Required heat is calculated by using below formula,

Q: Water melts at 0°C. A student observes a liquid that melts at 10°C. Which conclusion can the student…

A: Melting point is the temperature at which a solid melts.  It depends on - Composition of molecule…

Q: Ethanol melts at -144°C and boils at 78°C at a constant pressure of 1atm. What state of matter must…

A: The boiling point of a substance is the temperature at which the vapor pressure of the liquid equals…

Q: We pack two identical coolers for a picnic, placing 24 12-ounce soft drinks and five pounds of ice…

A: When two objects are kept together in contact and both of them possess different temperature then…

Q: What is the state of matter if the particles are spread out and have little to no inter-molecular…

A: We know about the state of matter consist of generally solid, gas and liquid.  Among them, solid is…

Q: What is the Simpliest form of substance

A: What is the Simpliest form of substance

Q: When 50 g of ethanol is heated from T1 below its freezing point to a temperature T2 above its…

A: The amount of heat energy required for raising the temperature from one particular temperature to…

Q: What are solid substances?

A: Given,  solid substances

Q: Lead has a heat of fusion of 23.140 J/g, along with a specific heat of o.12928 J/(g °C) in its solid…

A:

Q: if chart B represents the cooling of a 14.0 g of a substance at a constant rate, determine the…

A: During cooling, the substance loses energy (in the form of heat) and the temperature of the system…

Q: a 44 gram piece of ice at 0 degrees celsius is added to a sample of water at 6.8 degrees celsius.…

A: The mass of ice is = 44 g The mass of water sample =? The temperature of ice is = 0 degrees celsius…

Q: What happens to a snowflake when it is put in the freezer? does it melt or does it become glass ice?…

A: Solution - According to the question - Given - snowflake icon represents the number 1 or the least…

Q: Which phase change is an endothermic process? a) evaporation O b) deposition Oc) freezing

A: The energy difference between the products and reactants is known as the energy change of a…

Q: a) Rank the three common states of matter in order from least ordered to most ordered. b) How is…

A:

Q: Evidence of a chemical reactions is anything that shows... A.a change in the state of matter B.…

A: A new substance has formed. Option C

Q: Melting point can be defined as the temperature when a solid becomes a liquid. The melting point of…

A: All matter can be classified as solid, liquid and gases mainly. In these physical states of matter,…

Q: Define the phases of matter and phase change?

A: The state of matter that is uniform throughout in physical state and chemical composition is known…

Q: A 35.8-g sample of cadmium metal was melted by an electric heater providing 4.66 J/s of heat. If it…

A: The amount of cadmium sample is = 35.8 g Time take to melt this sample is = 6.92 min The heat…

Q: 2. Note on the graph the temperature at which all of the ice has melted and the temperature at which…

A:

Q: Construct the flow chart (diagram) and compute the total heat required to convert 650g of ice at…

A:

Q: which best explains metals having low specific heat ?

A: Specific  heat of a metal is defined as the heat capacity per unit mass.

Q: A 45.0 mL sample of water is heated to its boiling point. How much heat is required to vaporize it?…

A: Given volume of water is--- 45.0mL Density of water is --- 1.00g/mL How much heat is required to…

Q: If chart B represents the cooling of a 14.0 g of a substance at a constant rate, determine the…

A: The substance is in the liquid phase from C to D. We can find the specific heat of the substance by…

Q: You may want to reference (Pages 80 - 87) Sections 3.6-3.7 while completing this problem. A 143-g…

A: Given information, Mass of sample (m) = 143 g  Initial temperature (T1) = 100°C  Final temperature…

Q: 1.Can the states of matter change from one form to another (ex solid to liquid)? Yes or No? How?…

A: Answer: Matter exists in three physical states: 1. Solid state 2. Liquid state 3. Gaseous state

Q: Is a phase change a chemical change? Why or why not?

A: In chemical changes, the new composition of elements is formed.

Q: Which change happens when a substance melts? O The molecules of the substance move farther apart,…

A: The correct option is as follows:

Q: 10 Temperature (°C) CHAPTER 5 MULTIPLE-CHOICE QUESTIONS Questions 1-5 use the following information.…

A: We are given the heating curve of a substance as follows:

Q: This graph represents the cooling curve for a pure substance in a liquid state at t =0 min. Cooling…

A: It is given a cooling curve for a liquid in which a liquid is converted into a solid,

Q: A) Elaborate the different methods for removal of impurities from water.

A: Purification means the removal of unwanted impurities present in an organic compound. Impurities in…

Q: a) How do you call the technique used to determine the heat gained or lost by a substance during a…

A: a) Given: The technique used to determine the heat gained or lost by a substance during a chemical…

Q: Ice melts to form liquid water Describe this physical change in terms of the arrangement of the…

A: Solid to liquid transformation is a physical change as we are adding some energy. This process is…

Q: It determines the phase of a substance. A. its pressure and temperature B. its mass and volume C.…

A: There are the three common phases of matter - solid, liquid and gas. The phases of a matter depend…

Q: A student wants to investigate the effects of liquid dish detergent on the properties of water. She…

A: Detergent is surfactant.

Q: Why is it important to study the properties of solid and liquids?

A: Let us first understand what the matter is. Every object in the universe is made of matter. Every…

Q: The graph below represents the heating curve of a substance that starts as a solid below its…

A: Since you have posted a question with multiple sub-parts, we will solve the first three subparts for…

Q: How many grams of water can be heated from 16.0 °C to 95 °C using 125 kJ?

A: Since you have posted multiple questions, we are entitled to answer the first only.

Q: If 145 KJ Of Energy Is Added To Water, What Mass Of Water Can Be Heated From 35 °C To 100 C And Then…

A: If 145 kJ of energy is added to water, the mass of water that can be heated from 35 °C to 100 °C and…

Q: Are the melting temperature and freezing temperature the same for a pure substance? Why is that?

A: Melting point is the temperature at which solid substance start to convert into liquid. Example:…

Q: The graph below represents the heating curve of a substance that starts as a solid below its…

A: A = solid is getting heated B = Process of Melting (solid - liquid equilibrium) C = liquid is…

Q: Give two examples of the topics listed below that happen in everyday life. 1. Endothermic process 2.…

A: 1. Endothermic process2. Vaporization3. Sublimation4. Exothermic process5. Freezing

Q: What type(s) of compounds can be recrystallized? Liquids Gases Solids Liquids and Solids Liquids,…

A: Crystallization is a process of formation of crystals i.e. separation of solid. Recrystallization is…

Q: A sample of water at 16.0 °C required an input of 1.97 × 104 J of heat to reach its boiling point,…

A: Heat absorbed, Q = 1.97 × 104 J Change in temperature = 100.0 °C - 16.0 °C = 84 °C Specific heat…

Q: 1. What error occurred by using (a) a single large piece of ice? Or (b) very fine shavings of ice?…

A: A). Using a single piece of ice As rate of heat absorption is directly proportional to the surface…