Author Question: The combustion of ethylene proceeds by the reaction C2H4 (g) + 3O2 (g) 2CO2 (g) + 2H2O (g) When the ... (Read 97 times)

rlane42 · **on:** Aug 27, 2018

The combustion of ethylene proceeds by the reaction C2H4 (g) + 3O2 (g) 2CO2 (g) + 2H2O (g) When the rate of disappearance of O2 is 0.13 M s-1, the rate of disappearance of C2H4 is ________ M s-1.

A) 0.087
B) 0.043
C) 0.39
D) 0.20
E) 0.26

Question 2

The temperature of a 11.8 g sample of calcium carbonate CaCO3 (s) increases from 24.8 C to 38.0 C. If the specific heat of calcium carbonate is 0.82 J/g-K, how many joules of heat are absorbed?

A) 130 J
B) 0.92 J
C) -130 J
D) -0.92 J
E) 11 J