Worksheetssec 1 lesson 3 quiz 3 chapter 4
Total questions: 20
Worksheet time: 3600secs
The opposite figure shows a pressure cooker, it does not allow the liquids found inside it to escape during cooking, after the cooking is finished, the high pressure of water vapour inside the cooker causes its valve to move upwards making a sound of whistle, this is why the pressure cooker is considered as a(an) ............... system.
closed
open
isolated
no correct answer
Which of the following statements is correct?
The concept of temperature is the same concept of heat.
The concept of temperature is the same concept of kinetic energy of matter molecules.
Heat is a characteristic property of the substance.
The concept of temperature represents the internal energy of matter molecules
The average kinetic energy of H2O molecules decreases by the conversion of a certain mass of …
Liquid water its temperature is 64°C to liquid water its temperature is 27°C
Liquid water its temperature is 100°C to water vapour its temperature is 100°C
Ice its temperature is -73°C to ice its temperature is -36°C
Ice its temperature is 0°C to water its temperature is 0°C
Kilocalorie is from energy units which equals ...
418 J
4.18 J
4180 J
41.8 kJ
If two bodies have the same mass, gain the same quantity of heat, and the raise in the temperature of the second body is double that of the first, therefore the specific heat of the second body is ............... the first one.
equal to
double
half
quarter
All the following can be identified by knowing the specific heat of metals, except...
the quantity of heat needed to raise the temperature of 10 g of a metal by 10°C.
the quantity of heat released by cooling 10 g of a metal from 100°C to 25°C.
Internal energy of metal.
The gram atomic mass of the metal.
What is the quantity of heat which is released by cooling 50 g of water from 20°C to 10°C? ...
5 x 102 J
1.67 x 105 J
2.09 x 103 J
1.13 x 106 J
A sample of water its mass equals 100 g, its initial temperature is 22°C, this sample acquired a quantity of heat which equals 8360 J, what is the final temperature of the sample ? ...
18.3°C
20°C
25.7°C
42°C
What is the temperature of the mixture formed of 100 g of water with temperature 15°C and 250 g of water with temperature 50°C in a supposedly isolated position? ...
31.4°C
40°C
44°C
50°C
Fuels can also be used to provide energy. Which of the following fuels does not produce energy through a chemical reaction?
Biofuels
Fuel cells
Nuclear fuel
Fossil fuel
Many chemical reactions are used to provide energy in the form of heat. However, what type of useful energy do the chemical reactions inside batteries provide?
Sound
Electicity
Light
Gravitational
Diphenyl oxalate, hydrogen peroxide, and rhodamine A are mixed together in a plastic tube. After a few seconds, the plastic tube begins to feel warm, and the resulting mixture starts to glow a bright-red colour. Which types of energy are produced by the mixture?
Light only
Heat only
Heat and light
Light and electric
In the process: N2+Energy→N+N
Which of the following statements scans the previous process?
Breaking bonds takes place, this process is endothermic.
Breaking bonds takes place, this process is exothermic.
Forming bonds takes place, this process is exothermic.
Forming bonds takes place, this process is endothermic.
The molar bond energy of F2 is 159 kJ/mol.Calculate the energy of one F-F bond.
1.65 x 10-19 J
2.64 x 10-19 J
9.58 x 10-19 J
3.78 x 10-19 J
What is Avogadro’s number to 2 decimal places?
6.02 x 1023
6.71 x 1014
109
1.38 x 10-23
3.70 mol of Cl-Cl bonds release 888 kJ of energy when they form. How much energy is released when 1000 Cl-Cl bonds form?
3.99 x 10-16 J
1.48 x 10-15 J
3.99 X 10-19 J
1.48 X 10-18 J
Which of the following quantities of bonds requires the most energy to break?
5.8 mol I-I (148 KJ/mol)
1.7 mol O=O (494 KJ/mol)
2.0 mol H-Cl ( 428 KJ/mol)
2.0 mol H-H (436 KJ/mol
The energy of the hydrogen–hydrogen bond in H2 is 436 kJ/mol.Which of the following is an equivalent description of the bond energy in hydrogen?
436 kJ of energy is required to form the hydrogen–hydrogen bonds of 6.02×1023 hydrogen molecules.
For every hydrogen–hydrogen bond in a hydrogen molecule formed, 436 kJ of energy is released.
436 kJ of energy is released when the hydrogen–hydrogen bonds of 6.02 x 1023 hydrogen molecules are broken.
436 kJ of energy is required to break the hydrogen–hydrogen bonds of 6.02 x 1023 hydrogen molecules.
A food manufacturer determines that the energy content of one slice of their new bread is 400 kJ.What value is this in kilocalories?Give your answer to 1 decimal place.
95.6
95.2
96
95
A chocolate bar is found to contain 228 kcal.What value is this in units of kilojoules?Give your answer to the nearest whole number.
954
955
956
953
