Causes of Change Flashcards
Temperature and heat are different but related _________ properties.
physical
If a sample has a ________ temperature than its surrounding, energy is transferred from the sample.
higher
If the temperature of the sample is _______ than its surroundings, energy is transferred to the sample.
lower
The energy transferred between objects that are at different temperatures is ________
heat
The _____ of a sample is a measure of the average kinetic energy of the particles in a sample
temperature
The temperature of a sample does not depend on the amount of the sample, therefore temperature is a ___ property
intensive
In contrast, heat is a________ property, which means that the amount of energy transferred as heat depends on the amount of the sample.
extensive
The total energy content of a sample is its ______, and is represented by the symbol H.
enthalpy
The SI temperature unit is _____
Kelvin
A kelvin is the same temperature interval as a degree________
Celsius
What is energy?
The ability to do work or produce heat
What is potential energy?
the energy due to the composition or position of an object
What is kinetic energy?
Energy of motion
What is a calorie?
the amount of energy required to raise the temperature of 1 gram of pure water by one degree celsius
What is specific heat?
The amount of heat required to raise the temperature of 1 gram of that substance by one degree Celsius
What is thermochemistry?
The branch of science concerned with the energy(heat) changes that accompany chemical and phase changes
What is a system?
The specific part of the universe that contains the reaction or process
What is enthalpy?
the heat content of a system at constant pressure
What is molar enthalpy?
The energy change for 1 mole of a pure substance