سوال ۱۲ کنکور ارشد فیزیک ۱۴۰۱

PART B: Cloze Passage — blank (12)

Fuel cell electric vehicles emit only water vapor and warm air, (11) .......... no tailpipe emissions. Similar to electricity, hydrogen is an energy carrier that can be produced from various feedstocks. These feedstocks and production methods should be considered when (12) ...........

Argonne National Laboratory’s (ANL) report, Fuel Choices for Fuel Cell Vehicles: Well-to-Wheels Energy and Emission Impacts, analyzed greenhouse gas (GHG) (13) .......... 10 of the most common hydrogen production and distribution pathways. ANL found that gaseous hydrogen produces (14) .......... GHGs than liquid hydrogen in most cases. ANL also investigated hydrogen’s effects on petroleum use and found that using hydrogen as a fuel (15) .......... petroleum use by nearly %100 regardless of fuel production pathway.