February 28, 2017

Homework Help: chemistry

Posted by Sarah on Monday, January 18, 2010 at 1:20pm.

1. Chemical reactions may occur when two different molecules collide. The frequency and energy of the collisions determine how many reactions occur. How would you expect that frequency of collisions in a gas to change if the temperature changes from 293 K to 303 K (20°C to 30°C)?
A) 0% increase
B) 2% increase
C) 20% increase
D) 100% increase

2. What increase in reaction rate would you expect between two gaseous chemicals if the total pressure in the reaction vessel is doubled?
A) no change
B) double
C) quadruple

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