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steposvetlana [31]
3 years ago
11

List four observation that suggest a chemical change is occuring

Chemistry
1 answer:
andrezito [222]3 years ago
8 0
1.) Gas given off
2.) precipitate formed
3.) large amount of heat given off
4.) Color change
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The balanced equation for this reaction is C2H2 + 502 + 4H2O + 3C02. What volume of carbon dioxide is produced when 2.8 L of oxygen are consumed? 25Explanation:

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55 L of a gas at 25oC has its temperature increased to 35oC. What is its new volume?
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Approximately 56.8 liters.

Assumption: this gas is an ideal gas, and this change in temperature is an isobaric process.

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Assume that the gas here acts like an ideal gas. Assume that this process is isobaric (in other words, pressure on the gas stays the same.) By Charles's Law, the volume of an ideal gas is proportional to its absolute temperature when its pressure is constant. In other words

\displaystyle V_2 = V_1\cdot \frac{T_2}{T_1},

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  • V_1 is the initial volume,
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  • T_1 is the initial temperature in degrees Kelvins.

Convert the temperatures to degrees Kelvins:

T_1 = \rm 25^{\circ}C = (25 + 273.15)\; K = 298.15\; K.

T_2 = \rm 35^{\circ}C = (35 + 273.15)\; K = 308.15\; K.

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