Multiple Choice
What is the pressure of a 75.0 g sample of N2O in a 4.12 L vessel at 298 K, assuming ideal gas behavior? (R = 0.0821 L·atm/mol·K)
7. Gases
The Ideal Gas Law
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Why is Venus hotter than Mercury despite being further from the Sun?
A
Venus is closer to the Sun than Mercury.
B
Venus rotates faster, generating more heat.
C
Venus has a thicker atmosphere that traps heat through the greenhouse effect.
D
Venus has a higher albedo, reflecting more sunlight.
Verified step by step guidance1
Identify the key factors that influence a planet's temperature: distance from the Sun, atmospheric composition, and surface characteristics.
Understand the concept of the greenhouse effect: certain gases in a planet's atmosphere trap heat, preventing it from escaping back into space, thus warming the planet.
Recognize that Venus has a thick atmosphere composed mainly of carbon dioxide, a potent greenhouse gas, which traps heat effectively.
Compare the atmospheres of Venus and Mercury: Mercury has a very thin atmosphere, which does not retain heat, while Venus's thick atmosphere leads to a strong greenhouse effect.
Conclude that despite being further from the Sun, Venus's thick atmosphere and strong greenhouse effect make it hotter than Mercury.
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