4 ms·

Ammonia, NH_3?

• colechristensen 5y ago
  I’m pretty sure Mars is too warm to have solid surface ammonia
  • pomian 5y ago
    very possible!!!! In fact, the ground temperatures at the rover landing sites swing up during the day and down again during the night, varying by up to 113 degrees Celsius (or 235 degrees Fahrenheit) per Mars day. https://mars.nasa.gov/mer/mission/rover/temperature/ https://mars.nasa.gov/mer/mission/rover/temperature/ Melting (freezing) point 195.42K-77.73°C https://www.engineeringtoolbox.com/ammonia-d_1413.html https://www.engineeringtoolbox.com/ammonia-d_1413.html
    • colechristensen 5y ago
      Those temps for the freezing point will be for pressures above the triple point of ammonia, or pressures you’d find on earth. The pressure on mars is too low for liquid ammonia to exist and the freezing/sublimation temperature is more like 180K or -100C And to exist underground in large amounts for millions or billions of years it’s not good enough for temperatures to occasionally be low enough to freeze ammonia, when it was warmer the ammonia would turn into gas and blow away so unless there is a significant local source of ammonia it is highly doubtful that is where the hydrogen comes from.