1. Which has the greater kinetic energy, an object with a mass of 2.0 kg and a velocity of 1.0 m/s or an object with a mass of 1.0 kg and a velocity of 2.0 m/s?

Q: 3. A paraffin wax candle weighs 10.553 grams. The candle is lit and then immediately placed in a…

A: 3. Given, Initial mass of a paraffin wax candle = 10.553 g. Amount of water in calorimeter = 125 g.…

Q: When a cold 100 g iron bar was placed into a water bath, the temperature of the bath decreased by…

A: Here we are required to heat was transferred to iron bar.

Q: A chemist measures the energy change AH during the following reaction: 2 HgO(s) → 2 Hg(1) + O₂(g)…

A: In an exothermic reaction, heat is released, and in an endothermic reaction, heat is absorbed.

Q: 4. A system undergoes a process consisting of the following two steps: Step 1: The system absorbs 73…

A: According to the first law of thermodynamics, the energy of the universe remains constant. For the…

Q: 7. For the following scenarios what is the metal? a. A piece of metal weighing 59.047 g was heated…

A: Given,a, mass of metal = 59.047 gInitial temperature of metal = 100.0 oCvolume of water = 100.0…

Q: Magnesium burns in air to produce a bright light and is often used in fireworks displays. The…

A:

Q: How much heat is required to raise the temperature of a 75.0 gram sample of Titanium from 46.OC to…

A: The required amount of heat to increase the temperature of a compound can be determined by the…

Q: Consider the combustion of methane (CH). Suppose that 1789 kJ of heat are produced. What mass of O,…

A: To determine the mass of oxygen (O₂) consumed during the combustion of methane (CH₄), we'll start by…

Q: A 50.0 g sample of an unknown substance, initially at 20.2 °C, was heated with 1.55 kJ of energy.…

A: Given information: Mass of water = 50.0 g Initial temperature (Ti) = 20.2 ͦC Final temperature (Tf)…

Q: What is the kinetic energy in kilojoules of a snail weighing 0.002981 kg and moving at a velocity of…

A: weight of snail (m) = 0.002981kg velocity (v) = 16.55 km/y =0.00052479706 = 5.25 x 10-4 m/s…

Q: A 1467 kg1467 kg car is traveling down the road at 81.0 km/h.81.0 km/h. While traveling at this rate…

A:

Q: A rock is sitting at the top of a 15.33 m hill, and has a potential energy of 3000.0 J. What is the…

A:

Q: A student is collecting data for the reaction of baking soda and vinegar. The initial temperature of…

A: Exothermic and endothermic reactions are two types of chemical reactions that differ in the way they…

Q: 31.) A small candy bar has 52.0 Calories.  If all the energy is converted to heat by how much would…

A: For any known substance whose mass/amount is 1.0 gram, the heat amount (Q) necessary for…

Q: Convert an energy of 526 cal to units of joules. 09890 Convert an energy of 225 cal to units of…

A: Given -> (2)-> 526 cal  (3)->  225 cal

Q: Suppose the 25.0 g of the following substances all initially at 27.0 °C absorb 2.35 kJ of energy.…

A: Amount of heat,Q required to change the temperature of a substance of mass ,m and specific heat…

Q: A calorimeter contains 100.0 g of water at 39.8 °C. A 12.78 g object at 100.0 °C is placed inside…

A:

Q: As a system increases in volume, it absorbs 52.0 J of energy in the form of heat from the…

A: Given: Decreased internal energy= 106.2 J Absorbed heat= 52.0 J Final volume= 58.6 L Working…

Q: Copper has been used for thousands of years, either as a pure metal or in alloys. It is frequently…

A: Energy to recycle is 1.40 mol Cu  Step 1: CuO(s) to Cu(s) q1=1.40*155 = 217 kJ   Step 2: Cu(s) at 25…

Q: A gas is compressed from an initial volume of 5.70 L to a final volume of 1.24 L by an external…

A: Given:Initial Volume V1 = 5.70 L. Final Volume V2= 1.24 LPressure = 1.0 atm.Heat = -125 J (energy is…

Q: A student heats 84.17 mL of water to 95.27°C using a hot plate. The heated water is added to a…

A: It is given that 84.17 mL of hot water at a temperature of 95.27°C is added to 73.92 mL of cold…

Q: 2) The specific heat capacity of iron is 0.461 J/g K and 0.544 J/g K for titanium. A sample…

A: Given,Specific heat capacity of iron = 0.461J/gK.Specific heat capacity of titanium = 0.544J/gK.Mass…

Q: 5. A system compresses when 457 J of work was done on it at the same time it decreases it energy to…

A: Given,  A system 457 J of work done when it compresses, at the same time it decreases energy to 234…

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 267.0 mg sample…

A: The amount of heat needed to raise the temperate by :Here,

Q: A sample of nickel is heated to 99.8 0 C and placed in a coffee cup calorimeter containing 150.0 g…

A: Specific heat capacity of nickel = 0.0444 J g-1 K-1 Specific heat capacity of water = 4.18 J g-1 K-1…

Q: A sample of aluminum, initially at 5.0 °C, was placed in 18.0 g of water, initially at 25.0 °C. The…

A: We have given that  A sample of aluminum, initially at 5.0 °C, was placed in 18.0 g of water,…

Q: Which one of the following statements is not correct?

A: Forming of dew is considered as an exothermic process and carbon dioxide sublimation is an…