Jack occasionally goes to work by bicycle where he exhales once per 3.00 sec. If in Jack’s every exhale is 4.50% CO2 (by volume), he exhales a total volume of 4.6 L each time, and it takes Jack 20.0 minutes to bike to work, how many grams of CO2 has he created if the density of CO2 is 1.98 g/L? Is it a “greener activity” to cycle instead of driving a car?
20 min x (60 sec/min) = 120 seconds.
4.6 L/exhale x (1 exhale/3 sec) = 1.533 L/sec.
1.533 L/sec x 120 sec = 184 L.
184L x (0.045 LCO2/L) = 8.28 L CO2
Use mass = volume x density to convert to grams CO2.
I don't know how much CO2 is evolved if Jack drives to work but I suspect cycling is greener.
1200 seconds not 120 seconds?
Can you reply? I know this was years ago. Anyone know if she meant 1200? I have a course work due in by 15th and I need to know if I go with big numbers or her way?
To calculate the grams of CO2 Jack has created, we need to find the total volume of CO2 he has exhaled and then multiply it by the density of CO2.
First, let's determine the total number of exhales Jack makes during his 20.0-minute bike ride. To do this, we need to calculate the time it takes for one exhale and then divide the total biking time by that.
One exhale takes place every 3.00 seconds. We can calculate the number of exhales per minute by multiplying the inverse of 3.00 seconds by 60 seconds:
Exhales per minute = 1 / (3.00 seconds) * 60 seconds = 20 exhales
Since each exhale has a volume of 4.6 L, we can find the total volume of CO2 exhaled by multiplying the number of exhales per minute by the volume of each exhale:
Total volume exhaled = (Exhales per minute) * (Volume per exhale) = 20 exhales * 4.6 L/exhale
Next, we need to convert the total volume exhaled into grams of CO2. We can do this by multiplying the total volume exhaled by the density of CO2:
Grams of CO2 produced = (Total volume exhaled) * (Density of CO2) = (20 exhales * 4.6 L/exhale) * 1.98 g/L
Now, we can calculate the result:
Grams of CO2 produced = 20 exhales * 4.6 L/exhale * 1.98 g/L
After performing the calculation, you will get the answer for the number of grams of CO2 produced.
As for whether cycling is a "greener activity" compared to driving a car, it depends on various factors such as the fuel efficiency of the car and the source of electricity used for charging an electric car. Generally, cycling is considered a more environmentally friendly mode of transportation as it doesn't produce tailpipe emissions like cars do and has a smaller carbon footprint.