Entropy (OCR A-Level Chemistry A): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What does entropy () measure in a chemical system?
What does entropy () measure in a chemical system?
Energy dispersal and disorder
What are the units of entropy?
What are the units of entropy?
Which state of matter generally has the greatest entropy?
Which state of matter generally has the greatest entropy?
Gas
What is the entropy value of all substances at absolute zero ()?
What is the entropy value of all substances at absolute zero ()?
Zero
If a system becomes more random, what is the sign of ?
If a system becomes more random, what is the sign of ?
Positive
What happens to entropy when a solid melts to form a liquid?
What happens to entropy when a solid melts to form a liquid?
Entropy increases
What is the sign of for: ?
What is the sign of for: ?
Negative
What are the standard conditions for standard entropy ()?
What are the standard conditions for standard entropy ()?
and
Can standard entropy values () be negative?
Can standard entropy values () be negative?
No, always positive
What formula calculates entropy change of reaction ()?
What formula calculates entropy change of reaction ()?
(products) (reactants)