{"id":1904,"date":"2022-02-16T08:00:43","date_gmt":"2022-02-16T08:00:43","guid":{"rendered":"https:\/\/blogs.glowscotland.org.uk\/gc\/n5chemskills\/?page_id=1904"},"modified":"2022-03-10T10:16:13","modified_gmt":"2022-03-10T10:16:13","slug":"ep3_1a-n5-chemical-formula-identifying-chemical-physical-changes","status":"publish","type":"page","link":"https:\/\/blogs.glowscotland.org.uk\/gc\/n5chemskills\/ep3_1a-n5-chemical-formula-identifying-chemical-physical-changes\/","title":{"rendered":"EP3_1A N5 Chemical Formula – Identifying Chemical & Physical Changes"},"content":{"rendered":"\n\n\n\n
\u00a0Identifying Chemical & Physical Change<\/td>\n\u00a0(I)<\/td>\n\u00a0(II)<\/td>\n\u00a0(III)<\/td>\n<\/tr>\n
<\/td>\n\"\"<\/a><\/td>\n\"\"<\/a><\/td>\n\"\"<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n
\n

SUMMARY<\/h3>\n

Changes of substances can be classified as physical or chemical. The key difference between the two is that for a chemical change<\/em><\/strong><\/span> a new<\/strong><\/em><\/span> substance is ALWAYS<\/strong><\/span> produced.<\/p>\n

Signs of a chemical reaction:<\/p>\n

    \n
  • Color Change.<\/li>\n
  • Change of Temperature [energy change].<\/li>\n
  • Evolution of a gas (formation of bubbles)<\/li>\n
  • Precipitate (formation of a solid after two solutions are mixed, mixture would turn cloudy)<\/li>\n<\/ul>\n

    For physical change a change of state or shape occurs, but crucially, no<\/strong><\/em><\/span> new<\/strong><\/em><\/span> substance is formed.<\/p>\n

      \n
    • Change in size or shape.<\/li>\n
    • Change in state of matter (melting\/ freezing boiling\/ condensing)*<\/span>.<\/li>\n
    • Reversible.<\/li>\n
    • No new substance formed!<\/li>\n<\/ul>\n

      * Ice, water and steam (or vapour) are chemically the same compound, H2<\/sub>O, but just in solid, liquid or gas state.\u00a0 As ice melts or water boils, it is still H2<\/sub>O.\u00a0 The liquid water can be refrozen to form ice.<\/span><\/span><\/td>\n<\/tr>\n

<\/td>\n<\/tr>\n
<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
1.<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\nGEN 2011\/12<\/td>\n<\/tr>\n
\u00a02.<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\nGEN 2012\/5<\/td>\n<\/tr>\n
\u00a03.<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n\u00a0\"\"<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n\u00a0GEN 2013\/4<\/td>\n<\/tr>\n
\u00a04.<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n\u00a0\"\"<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n\u00a0\u00a0\u00a0GEN 2007\/4<\/td>\n<\/tr>\n
\u00a05.<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n\u00a0\"\"<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n\u00a0\u00a0\u00a0GEN 2010\/11<\/td>\n<\/tr>\n
\u00a06.<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n\u00a0\"\"<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n\u00a0\"\"<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n\u00a0GEN 2010\/13<\/td>\n<\/tr>\n
\u00a07.<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n\u00a0\"\"<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n\u00a0\u00a0GEN 2012\/6<\/td>\n<\/tr>\n
\u00a08.<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n\u00a0\"\"<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n\u00a0GEN 2012\/18<\/td>\n<\/tr>\n
\u00a09.<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n\u00a0\"\"<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n\"\"<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n\u00a0\u00a0GEN 2013\/16<\/td>\n<\/tr>\n
\u00a010.<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n\u00a0\"\"<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n\u00a0GEN 2013\/167<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/h3>\n\n\n\n
\n

NOW CHECK YOUR ANSWERS<\/h3>\n<\/td>\n

<\/td>\n\"\"<\/a>
\n<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

\u00a0Identifying Chemical & Physical Change \u00a0(I) \u00a0(II) \u00a0(III) SUMMARY Changes of substances can be classified as physical or chemical. The key difference between the two is that for a chemical change a new substance is ALWAYS produced. Signs of a chemical reaction: Color Change. Change of Temperature [energy change]. Evolution of a gas (formation of … Continue reading “EP3_1A N5 Chemical Formula – Identifying Chemical & Physical Changes”<\/span><\/a><\/p>\n","protected":false},"author":2454,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1904","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/n5chemskills\/wp-json\/wp\/v2\/pages\/1904","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/n5chemskills\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/n5chemskills\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/n5chemskills\/wp-json\/wp\/v2\/users\/2454"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/n5chemskills\/wp-json\/wp\/v2\/comments?post=1904"}],"version-history":[{"count":17,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/n5chemskills\/wp-json\/wp\/v2\/pages\/1904\/revisions"}],"predecessor-version":[{"id":2178,"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/n5chemskills\/wp-json\/wp\/v2\/pages\/1904\/revisions\/2178"}],"wp:attachment":[{"href":"https:\/\/blogs.glowscotland.org.uk\/gc\/n5chemskills\/wp-json\/wp\/v2\/media?parent=1904"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}