A sample consisting of 1.00 mol of Argon is expanded isothermally at 273.15 K from 22.4 L to 44.8 L. Calculate DH, w, and q assuming Argon is an ideal gas and the expansion process is: (a) reversible (b) irreversible, against a constant external pressure equal to the final pressure of the gas (c) irreversible, against zero external pressure (i. e., free expansion) Answer in kJ.

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.

rosa was looking for patterns to predict the products of chemical reactions. she recorded three similar decomposition reactions in the table.she should record 2licl + 3o2.

in the last row of the table. it is the thermal decomposition of chlorate lithium, hence, she should record these products as: lithium chloride ( 2licl ) and oxygen ( 3o2 )   2 > 2 licl + 3o2.