This covers phase change diagrams, specific heat, and enthalpy
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Questions 1 - 3 refer to this diagram:
Question 1
1.
Which letter(s) represents the area where a liquid is heating up?
Question 2
2.
Which letter(s) represent the area where liquid and gas are in thermal equilibrium?
Question 3
3.
What is the melting point (the temperature) of this substance?
Questions 4 - 6 refer to this Pressure - Temperature Diagram
Question 4
4.
Which letter represents a substance in the solid phase?
Question 5
5.
What is the pressure and temperature where all three states of matter coexist?
Question 6
6.
What is the approximate temperature for the boiling point of this substance when the pressure is 30 atm?
Question 7
7.
a. Using the specific heat table, which substance will take the most energy to change temperature? _______
b. Which substance will cool off the fastest? _______
Question 8
8.
If 200 grams of water is to be heated from 24.0°C to 100.0°C to make a cup of tea, how much heat (in kJ) must be added? The specific heat of water is 4.18 J/g∙C (formula q = m c (Tf - Ti))
Question 9
9.
How does heat flow?
Question 10
10.
In an exothermic reaction, heat energy is _______
Question 11
11.
Is this a Reaction pathway for an exothermic reaction or an endothermic reaction?
Question 12
12.
For the following thermochemical reactions indicate whether they are exothermic or endothermic
A 300 gram cube of lead is heated from 20 °C to 70 °C. How much energy was required to heat the lead? The specific heat of lead is 0.129 J/g°C.
Question 15
15.
How much heat is transferred when 147 g of NO2 reacts with excess H2O according to the following equation. (show your work, don't forget about signs indicating exothermic or endothermic reactions)