which of the following equations shows a chemical change? (1 point)\n○ $c_{2}h_{5}oh(l)\to…

which of the following equations shows a chemical change? (1 point)\n○ $c_{2}h_{5}oh(l)\to c_{2}h_{5}oh(g)$\n○ $nh_{3}(g)\to nh_{3}(l)$\n● $c_{3}h_{8}+5o_{2}\to 3co_{2}+4h_{2}o$\n○ $h_{2}o(s)\to h_{2}o(g)$

which of the following equations shows a chemical change? (1 point)\n○ $c_{2}h_{5}oh(l)\to c_{2}h_{5}oh(g)$\n○ $nh_{3}(g)\to nh_{3}(l)$\n● $c_{3}h_{8}+5o_{2}\to 3co_{2}+4h_{2}o$\n○ $h_{2}o(s)\to h_{2}o(g)$

Answer

Brief Explanations:

A chemical change results in the formation of new substances. In the equation $C_{3}H_{8}+5O_{2}\rightarrow3CO_{2}+4H_{2}O$, propane ($C_{3}H_{8}$) reacts with oxygen ($O_{2}$) to form carbon - dioxide ($CO_{2}$) and water ($H_{2}O$), which are new substances. The other equations represent phase changes (liquid to gas, gas to liquid, solid to gas) which are physical changes, not chemical changes.

Answer:

$C_{3}H_{8}+5O_{2}\rightarrow3CO_{2}+4H_{2}O$