Hot or Cold (Thermodynamics) Lesson 1

Question 1

thermal equilibrium

Answer 1

when two object’s temperatures are equal, and no more thermal energy is flowing between them

Question 2

heat

Answer 2

Energy that is transferred from one object to another, caused by a difference in temperature

Question 3

temperature

Answer 3

measurement of the hotness or the coldness of a body

Question 4

the common unit for heat

Answer 4

calorie (cal)

Question 5

definition of calorie

Answer 5

the amount of heat needed to raise the temperature of one gram (g) of water by one degree Celsius

Question 6

mechanical equivalent of heat

Answer 6

4.186 Joules (j) = 1 calorie of heat

Question 7

internal energy or thermal energy

Answer 7

The sum of all the energy possessed by all the molecules inside an object. Specifically, it is the sum of the potential energy + kinetic energy of all molecules inside an object.

Question 8

equation for heat

Answer 8

Q = mcT

Where Q = amount o heat, m = mass of object, c = specific heat of object, and T = temperature change

Question 9

measurement of specific heat

Answer 9

J/kg x C (degrees Celsius) or kJ/kg x C (degrees Celsius)

Question 10

specific heat

Answer 10

the amount of heat needed to raise the temperature of one gram of an object/material by one degree Celsius

Question 11

specific heat of water

Answer 11

4.19 kJ/kg x C

Question 12

specific heat of the human body

Answer 12

3.47 kJ/kg x C

Question 13

the relationship of temperature and internal energy or thermal energy

Answer 13

temperature is proportional to the average kinetic energy in an object