Pre-Lab Quiz - Constant Pressure Calorimetry

Which statements are true concerning a substance with a high specific heat? Select one or more: The substance cools down slowly after heating. The substance easily gets hot when heat is applied. An example substance is water. An example substance is aluminum metal.

-An example substance is water. -The substance cools down slowly after heating.

What is the correct reading of the temperature in the pictured thermometer? Make sure to report your reading with the appropriate significant figures.

44.4°C

A calorimeter measures the _____ involved in reactions or other processes by measuring the _____ of the materials _____ the process. The calorimeter is _____ to prevent the transfer of heat to outside the device.

A calorimeter measures the heat involved in reactions or other processes by measuring the temperature change of the materials surrounding the process. The calorimeter is insulated to prevent transfer of heat to outside the device.

Determine whether each described process is endothermic or exothermic. A process with a calculated negative q Wood burns in a fireplace Acid and base are mixed, making test tube feel hot Solid dissolves into solution, making ice pack feel cold A process with a calculated positive q Ice melts into liquid water

A process with a calculated negative q endothermic Wood burns in a fireplace exothermic Acid and base are mixed, making test tube feel hot exothermic Solid dissolves into solution, making ice pack feel cold endothermic A process with a calculated positive q endothermic Ice melts into liquid water endothermic

One calorie (cal) is the amount of heat needed to _____________ the temperature of one gram of water one degree Celsius.

Raise

What is the general definition of heat capacity? Select one: - The determination of whether heat is consumed or given off from one gram of a substance - The change in heat required to change the temperature of something by one degree Celsius - The ability of a reaction to consume or give off heat based on the mass of its reactants - The energy that exchanges with the surroundings due to a difference in temperature

The change in heat required to change the temperature of something by one degree Celsius.

What occurs in endothermic reactions?

heat energy is absorbed

When exothermic reactions occur, ______________.

heat energy is released