MasteringChemistry CHM1033 CH.2

The blue spheres below represent atoms. What state of matter is depicted in each bin?

Classify each type of matter as an element, a compound, a heterogeneous mixture, or a homogeneous mixture.

Classify each of the following pure substances as an element or a compound. a silicon (Si) chip oxygen (O2) hydrogen peroxide (H2O2) rust (Fe2O3) methane (CH4) in natural gas

Classify each of the following mixtures as homogeneous or heterogeneous. vegetable soup tea tea with ice and a lemon slices seawater fruit salad

Classify each of the changes as a physical change or a chemical change.

Classify each of the properties as a physical property or a chemical property.

What type of change, physical or chemical, takes place in each of the following? Water vapor condenses to form rain. Cesium metal reacts explosively with water. Gold melts at 1064 degrees Celsius. A puzzle is cut into 1000 pieces. Sugar dissolves in water.

Describe each of the following as a physical or chemical property. Chromium is a steel-gray solid. Hydrogen reacts readily with oxygen. Nitrogen freezes at -210 degrees Celsius. Milk will sour when left in a warm room.

Convert 22.0 ∘C to degrees Fahrenheit.

Becky is going to take her dog for walk in the park, but before she leaves, she watches the weather report. According to the weather report, it is 74.0 ∘F outside. What is the outside temperature in kelvins?

Arrange the following in order of decreasing temperature.

Solve the following temperature conversions:

Solve the following temperature conversions:

Solve the following temperature conversions:

Solve the following temperature conversions:

Solve the following temperature conversions:

Duncan takes a break from studying and goes to the gym to swim laps. If swimming burns 7.35×10^5cal per hour, how many kilojoules does swimming burn in that same amount of time? In other words, convert 7.35×10^5cal to kilojoules.

Duncan knows that it takes 36400cal of energy to heat a pint of water from room temperature to boiling. However, Duncan has prepared ramen noodles so many times he does not need to measure the water carefully. If he happens to heat 0.850pint of room-temperature water, how many kilojoules of heat energy will have been absorbed by the water at the moment it begins to boil?

The following table lists the specific heat capacities of select substances: Substance Specific heat capacity[J/(g⋅∘C)] silver 0.235 copper 0.385 iron 0.449 aluminum 0.903 ethanol 2.42 water 4.184 Water (3090g) is heated until it just begins to boil. If the water absorbs 5.61×10^5J of heat in the process, what was the initial temperature of the water?

The following table lists the specific heat capacities of select substances: Substance Specific heat capacity[J/(g⋅∘C)] silver 0.235 copper 0.385 iron 0.449 aluminum 0.903 ethanol 2.42 water 4.184 An unknown substance has a mass of 16.9g . When the substance absorbs 1.521×10^2J of heat, the temperature of the substance is raised from 25.0 ∘C to 45.0 ∘C . What is the most likely identity of the substance?

Substances A and B are the same mass and at the same initial temperature. When they are heated, the final temperature of A is 55 ∘C higher than the temperature of B. What does this tell you about the specific heats of A and B?

The following table lists the specific heats of some common substances: Substance Specific heat [J/(g⋅∘C)] aluminum (Al) 0.897 copper (Cu) 0.385 cast iron 0.460 gold (Au) 0.129 silver (Ag) 0.235 sodium chloride (NaCl) 0.864 stainless steel 0.500 water (H2O) 4.184 Rank the following species according to the decreasing energy needed to raise the temperature of 10.0 g of the substance by 25.0 ∘C.

The following table lists the specific heats of some common substances: Substance Specific heat [J/(g⋅∘C)] aluminum (Al) 0.897 copper (Cu) 0.385 cast iron 0.460 gold (Au) 0.129 silver (Ag) 0.235 sodium chloride (NaCl) 0.864 stainless steel 0.500 water (H2O) 4.184 If you pour equal amounts of scalding hot water into different metallic cups of equal temperature, which cup will heat up the most? Rank the cups from hottest to coldest.

Calculate the energy in joules and calories required to heat 27.0g water from 14.0∘C to 28.7∘C

Calculate the energy in joules and calories required to heat 27.0g water from 14.0∘C to 28.7∘C

Calculate the energy in joules and calories required to heat 38.0g copper (Cu) from 132∘C to 256∘C

Calculate the energy in joules and calories required to heat 38.0g copper (Cu) from 132∘C to 256∘C

Calculate the energy in joules and calories lost when 30.0g ethanol, C2H5OH, cools from 62.5∘C to -46.0∘C

Calculate the energy in joules and calories lost when 30.0g ethanol, C2H5OH, cools from 62.5∘C to -46.0∘C

Calculate the energy in joules and calories lost when 162g iron, Fe, cools from 168∘C to 45∘C

One cup of clam chowder contains 9g of protein, 11g of fat, and 15g of carbohydrate. How many kilocalories are in the clam chowder? (Round the final answers to the nearest tens place.)

One cup of clam chowder contains 9g of protein, 11g of fat, and 15g of carbohydrate. How many kilojoules are in the clam chowder? (Round the final answers to the nearest tens place.)

A high-protein diet contains 70g of carbohydrate, 160g of protein, and 4.9g of fat. How many kilocalories does this diet provide? (Round the final answers to the nearest tens place.)

A high-protein diet contains 70g of carbohydrate, 160g of protein, and 4.9g of fat. How many kilojoules does this diet provide? (Round the final answers to the nearest tens place.)

Using the following data, calculate the kilocalories for each food burned in a calorimeter: one stalk of celery that heats 550g of water from 25.0∘C to 36.0∘C.

Using the following data, calculate the kilocalories for each food burned in a calorimeter: a waffle that heats 4930g of water from 20.8∘C to 67.4∘C.

Drag the appropriate labels to their respective targets.

Rank from highest to lowest. To rank items as equivalent, overlap them.

Classify the following phase changes as processes that require the input of energy, or as processes that have a net output of energy.

Identify each of the following changes of state as melting, freezing, sublimation, or deposition: The solid structure of a substance breaks down as liquid forms.

Identify each of the following changes of state as melting, freezing, sublimation, or deposition: Coffee is freeze-dried.

Identify each of the following changes of state as melting, freezing, sublimation, or deposition: Water on the street turns to ice during a cold wintry night.

Identify each of the following changes of state as melting, freezing, sublimation, or deposition: Ice crystals form on a package of frozen corn.

Calculate the heat in calories needed to condense 19.0g of steam at 100∘C.

Indicate whether heat was absorbed or released in situation above.

Calculate the heat in joules needed to condense 7.10g of steam at 100∘C.

Indicate whether heat was absorbed or released in situation above.

Calculate the heat in kilocalories needed to vaporize 44g of water at 100∘C.

Indicate whether heat was absorbed or released in situation above.

Calculate the heat in kilojoules needed to vaporize 4.00kg of water at 100∘C.

Indicate whether heat was absorbed or released in situation above.