EASY
MYP:4-5
IMPORTANT
Earn 100

A thermite reaction can occur if rusty steel is covered by aluminium paint and hit by a hammer. Explain why this might happen.

Important Questions on Energy

EASY
MYP:4-5
IMPORTANT
MYP Chemistry A concept-based approach Years 4&5>Chapter 4 - Energy>Utilizing exothermic reactions>Q 1
What factors influence people's choice of cooking fuel ?
EASY
MYP:4-5
IMPORTANT
MYP Chemistry A concept-based approach Years 4&5>Chapter 4 - Energy>Utilizing exothermic reactions>Q 2
Choose two of the fuels wood, coal, ethanol, biodiesel, crude oil, diesel, gasoline, natural gas and research their environmental impact.
EASY
MYP:4-5
IMPORTANT
MYP Chemistry A concept-based approach Years 4&5>Chapter 4 - Energy>Thinking in context>Q 1
The energy needs of the world's population are increasing. What are the reasons for this ?
EASY
MYP:4-5
IMPORTANT
MYP Chemistry A concept-based approach Years 4&5>Chapter 4 - Energy>Thinking in context>Q 2
The sun supplies solar energy to our plant; it is limitless and free. Are we utilising this energy source effectively? What are the challenges in exploiting this source of energy?
EASY
MYP:4-5
IMPORTANT
MYP Chemistry A concept-based approach Years 4&5>Chapter 4 - Energy>Thinking in context>Q 3
Some power generation schemes transform their surrounding environment. For example, the three gorges dam is a hydroelectric dam that spans the yangtze river in china. It is over 2.3 km long. To create its reservoir, over 1 million people had to be relocated. Do the benefits of such projects justify the impact on the environment and its citizens?
EASY
MYP:4-5
IMPORTANT
MYP Chemistry A concept-based approach Years 4&5>Chapter 4 - Energy>Exercise 10>Q 1
Look back at the thermite reaction. Where did the energy come from to start the reaction?
EASY
MYP:4-5
IMPORTANT
MYP Chemistry A concept-based approach Years 4&5>Chapter 4 - Energy>Exercise 10>Q 2
In an endothermic or exothermic reaction, what do you observe when measuring the temperature of the reaction mixture with a thermometer?
EASY
MYP:4-5
IMPORTANT
MYP Chemistry A concept-based approach Years 4&5>Chapter 4 - Energy>Exercise 11>Q •
Chlorine, bromine and iodine are all halogen elements with many properties in common. At room temperature chlorine is a gas, bromine is a dark liquid (although it readily produces a brown vapour) and iodine is a crystalline solid. How do these three states differ from each other?