{"id":571,"date":"2012-01-25T17:11:02","date_gmt":"2012-01-25T17:11:02","guid":{"rendered":"https:\/\/schooltutoring.com\/help\/?p=571"},"modified":"2014-12-02T08:33:50","modified_gmt":"2014-12-02T08:33:50","slug":"physical-and-chemical-changes","status":"publish","type":"post","link":"https:\/\/schooltutoring.com\/help\/physical-and-chemical-changes\/","title":{"rendered":"Physical and Chemical Changes"},"content":{"rendered":"<p><strong>Physical changes<\/strong><\/p>\n<p class=\"MsoNormal\">Physical changes are changes that do not affect the chemical composition of a substance. No new product is formed during physical change. Physical changes are concerned with energy and states of matter. Many physical changes are reversible using physical means. For example, salt dissolved in water can be recovered by boiling the water allowing it to evaporate. Physical properties change during physical change. For example, color, shape, size, volume, durability.<\/p>\n<p class=\"MsoNormal\"><span style=\"text-decoration: underline\">Examples<\/span>:<\/p>\n<p class=\"MsoNormal\">\u00a0Melting of ice<\/p>\n<p class=\"MsoNormal\">\u00a0Breaking of wire into pieces<\/p>\n<p class=\"MsoNormal\">Dissolving sugar in water<\/p>\n<p class=\"MsoNormal\">Freezing water to make ice<\/p>\n<p class=\"MsoNormal\">Cutting paper into pieces<\/p>\n<p class=\"MsoNormal\"><strong>Chemical changes<\/strong><\/p>\n<p class=\"MsoNormal\">During chemical change a new substance is formed.<span>\u00a0 <\/span>The composition of a substance changes during chemical change. During chemical change one substance combines with another to form a new substance, or, decomposes into new substances. Chemical reactions lead to chemical changes which are not reversible except by further chemical reaction.<\/p>\n<p class=\"MsoNormal\">\u00a0<span style=\"text-decoration: underline\">Examples<\/span>:<\/p>\n<p class=\"MsoNormal\">\u00a0Cooking<\/p>\n<p class=\"MsoNormal\">\u00a0Burning fuel<\/p>\n<p class=\"MsoNormal\">\u00a0Rusting of iron<\/p>\n<p class=\"MsoNormal\">\u00a0Digesting food<\/p>\n<p class=\"MsoNormal\">\u00a0Mixing acid and base<\/p>\n<p class=\"MsoNormal\"><strong>How to differentiate between physical change and chemical change?<\/strong><\/p>\n<p class=\"MsoNormal\">A chemical change makes a substance that was not there before. A chemical change may be accompanied by light, heat, color change, gas production, odor, or sound which hints that a chemical change took place. The starting and ending substances of a physical change are the same, even though they may look different.<\/p>\n<p class=\"MsoNormal\">SchoolTutoring Academy is the premier educational services company for K-12 and college students. We offer tutoring programs for students in K-12, AP classes, and college. To learn more about how we help parents and students, visit: <a href=\"https:\/\/www.SchoolTutoring AcademyReviews.com\">SchoolTutoring AcademyReviews.com<\/a>.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Physical changes Physical changes are changes that do not affect the chemical composition of a substance. No new product is formed during physical change. Physical changes are concerned with energy and states of matter. Many physical changes are reversible using physical means. For example, salt dissolved in water can be recovered by boiling the water [&hellip;]<\/p>\n","protected":false},"author":19,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[5],"tags":[270,1329],"class_list":["post-571","post","type-post","status-publish","format-standard","hentry","category-chemistry","tag-chemicalchange","tag-physicalchange"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/schooltutoring.com\/help\/wp-json\/wp\/v2\/posts\/571","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/schooltutoring.com\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/schooltutoring.com\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/schooltutoring.com\/help\/wp-json\/wp\/v2\/users\/19"}],"replies":[{"embeddable":true,"href":"https:\/\/schooltutoring.com\/help\/wp-json\/wp\/v2\/comments?post=571"}],"version-history":[{"count":0,"href":"https:\/\/schooltutoring.com\/help\/wp-json\/wp\/v2\/posts\/571\/revisions"}],"wp:attachment":[{"href":"https:\/\/schooltutoring.com\/help\/wp-json\/wp\/v2\/media?parent=571"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/schooltutoring.com\/help\/wp-json\/wp\/v2\/categories?post=571"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/schooltutoring.com\/help\/wp-json\/wp\/v2\/tags?post=571"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}